diff --git a/src/System.Management.Automation/engine/hostifaces/AsyncResult.cs b/src/System.Management.Automation/engine/hostifaces/AsyncResult.cs
index 34e2ec8db6..50e2739c78 100644
--- a/src/System.Management.Automation/engine/hostifaces/AsyncResult.cs
+++ b/src/System.Management.Automation/engine/hostifaces/AsyncResult.cs
@@ -32,7 +32,7 @@ namespace System.Management.Automation.Runspaces
         /// Constructor
         /// </summary>
         /// <param name="ownerId">
-        /// Instace Id of the object creating this instance
+        /// Instance Id of the object creating this instance
         /// </param>
         /// <param name="callback">
         /// A AsyncCallback to call once the async operation completes.
diff --git a/src/System.Management.Automation/engine/hostifaces/Command.cs b/src/System.Management.Automation/engine/hostifaces/Command.cs
index 0b86e949d9..93d725f2fe 100644
--- a/src/System.Management.Automation/engine/hostifaces/Command.cs
+++ b/src/System.Management.Automation/engine/hostifaces/Command.cs
@@ -272,7 +272,7 @@ namespace System.Management.Automation.Runspaces
         internal PipelineResultTypes[] MergeInstructions { get; set; } = new PipelineResultTypes[MaxMergeType];
 
         /// <summary>
-        /// Merges this commands resutls
+        /// Merges this commands results
         /// </summary>
         /// 
         /// <param name="myResult">
@@ -874,7 +874,7 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// Gets the string represenation of the command collection to be used for history.
+        /// Gets the string representation of the command collection to be used for history.
         /// </summary>
         /// <returns>
         /// string representing the command(s)
diff --git a/src/System.Management.Automation/engine/hostifaces/Connection.cs b/src/System.Management.Automation/engine/hostifaces/Connection.cs
index 5a972e73b3..2c086626dc 100644
--- a/src/System.Management.Automation/engine/hostifaces/Connection.cs
+++ b/src/System.Management.Automation/engine/hostifaces/Connection.cs
@@ -419,7 +419,7 @@ namespace System.Management.Automation.Runspaces
     public enum RunspaceCapability
     {
         /// <summary>
-        /// No additional capabilites beyond a default runspace.
+        /// No additional capabilities beyond a default runspace.
         /// </summary>
         Default = 0x0,
 
@@ -674,7 +674,7 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// Get unqiue id for this instance of runspace. It is primarily used 
+        /// Get unique id for this instance of runspace. It is primarily used 
         /// for logging purposes
         /// </summary>
         public Guid InstanceId { get;
@@ -1394,7 +1394,7 @@ namespace System.Management.Automation.Runspaces
         /// </summary>
         /// <param name="command">A valid command string</param>
         /// <returns>
-        /// A pipline pre-filled with a <see cref="Command"/> object for specified command parameter.
+        /// A pipeline pre-filled with a <see cref="Command"/> object for specified command parameter.
         /// </returns>
         /// <exception cref="ArgumentNullException">
         /// command is null
@@ -1407,7 +1407,7 @@ namespace System.Management.Automation.Runspaces
         /// <param name="command">A valid command string</param>
         /// <param name="addToHistory">if true command is added to history</param>
         /// <returns>
-        /// A pipline pre-filled with a <see cref="Command"/> object for specified command parameter.
+        /// A pipeline pre-filled with a <see cref="Command"/> object for specified command parameter.
         /// </returns>
         /// <exception cref="ArgumentNullException">
         /// command is null
@@ -1430,7 +1430,7 @@ namespace System.Management.Automation.Runspaces
         /// <param name="command">A valid command string</param>
         /// <param name="addToHistory">if true command is added to history</param>
         /// <returns>
-        /// A pipline pre-filled with Command specified in commandString.
+        /// A pipeline pre-filled with Command specified in commandString.
         /// </returns>
         /// <exception cref="ArgumentNullException">
         /// command is null
diff --git a/src/System.Management.Automation/engine/hostifaces/ConnectionBase.cs b/src/System.Management.Automation/engine/hostifaces/ConnectionBase.cs
index 27992a269b..76443a472e 100644
--- a/src/System.Management.Automation/engine/hostifaces/ConnectionBase.cs
+++ b/src/System.Management.Automation/engine/hostifaces/ConnectionBase.cs
@@ -279,7 +279,7 @@ namespace System.Management.Automation.Runspaces
             OpenHelper(syncCall);
             if (etwEnabled) RunspaceEventSource.Log.OpenRunspaceStop();
 
-            // We report startup telemtry when opening the runspace - because this is the first time
+            // We report startup telementry when opening the runspace - because this is the first time
             // we are really using PowerShell. This isn't the cleanest place though, because
             // sometimes there are many runspaces created - the callee ensures telemetry is only
             // reported once. Note that if the host implements IHostProvidesTelemetryData, we rely
@@ -541,11 +541,11 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// Createa a pipeline froma command string
+        /// Create a pipeline from a command string
         /// </summary>
         /// <param name="command">A valid command string</param>
         /// <returns>
-        /// A pipline pre-filled with Commands specified in commandString.
+        /// A pipeline pre-filled with Commands specified in commandString.
         /// </returns>
         /// <exception cref="ArgumentNullException">
         /// command is null
@@ -566,7 +566,7 @@ namespace System.Management.Automation.Runspaces
         /// <param name="command">A valid command string</param>
         /// <param name="addToHistory">if true command is added to history</param>
         /// <returns>
-        /// A pipline pre-filled with Commands specified in commandString.
+        /// A pipeline pre-filled with Commands specified in commandString.
         /// </returns>
         /// <exception cref="ArgumentNullException">
         /// command is null
@@ -600,7 +600,7 @@ namespace System.Management.Automation.Runspaces
         /// <param name="command">A valid command string</param>
         /// <param name="addToHistory">if true command is added to history</param>
         /// <returns>
-        /// A pipline pre-filled with Commands specified in commandString.
+        /// A pipeline pre-filled with Commands specified in commandString.
         /// </returns>
         /// <exception cref="ArgumentNullException">
         /// command is null
@@ -623,7 +623,7 @@ namespace System.Management.Automation.Runspaces
         /// <param name="addToHistory">if true command is added to history</param>
         /// <param name="isNested">True for nested pipeline</param>
         /// <returns>
-        /// A pipline pre-filled with Commands specified in commandString.
+        /// A pipeline pre-filled with Commands specified in commandString.
         /// </returns>
         protected abstract Pipeline CoreCreatePipeline(string command, bool addToHistory, bool isNested);
 
@@ -866,7 +866,7 @@ namespace System.Management.Automation.Runspaces
                     throw e;
                 }
 
-                //Add the pipeline to list of Excuting pipeline.
+                //Add the pipeline to list of Executing pipeline.
                 //Note:_runningPipelines is always accessed with the lock so
                 //there is no need to create a synchronized version of list
                 RunningPipelines.Add(pipeline);
@@ -892,7 +892,7 @@ namespace System.Management.Automation.Runspaces
                 Dbg.Assert(RunspaceState != RunspaceState.BeforeOpen,
                              "Runspace should not be before open when pipeline is running");
 
-                //Remove the pipeline to list of Excuting pipeline.
+                //Remove the pipeline to list of Executing pipeline.
                 //Note:_runningPipelines is always accessed with the lock so
                 //there is no need to create a synchronized version of list
                 RunningPipelines.Remove(pipeline);
@@ -1529,7 +1529,7 @@ namespace System.Management.Automation.Runspaces
 
         /// <summary>
         /// Protected methods to be implemented by derived class.
-        /// This does the acutal work of setting variable.
+        /// This does the actual work of setting variable.
         /// </summary>
         /// <param name="name">Name of the variable to set</param>
         /// <param name="value">The value to set it to</param>
diff --git a/src/System.Management.Automation/engine/hostifaces/ConnectionFactory.cs b/src/System.Management.Automation/engine/hostifaces/ConnectionFactory.cs
index c40b6c674e..dae7f5d6d6 100644
--- a/src/System.Management.Automation/engine/hostifaces/ConnectionFactory.cs
+++ b/src/System.Management.Automation/engine/hostifaces/ConnectionFactory.cs
@@ -480,7 +480,7 @@ namespace System.Management.Automation.Runspaces
 
         /// <summary>
         /// Creates a RunspacePool 
-        /// on the specified remote runspace compuer.
+        /// on the specified remote runspace computer.
         /// <paramref name="maxRunspaces"/>
         /// limits the number of Runspaces that can exist in this
         /// pool. The minimum pool size is set to 
@@ -498,10 +498,10 @@ namespace System.Management.Automation.Runspaces
         /// The TypeTable to use while deserializing/serializing remote objects.
         /// TypeTable has the following information used by serializer:
         ///   1. SerializationMethod
-        ///   2. SerailizationDepth
+        ///   2. SerializationDepth
         ///   3. SpecificSerializationProperties
-        /// TypeTable has the following inforamtion used by deserializer:
-        ///   1. TargetTypeForDeserializaiton
+        /// TypeTable has the following information used by deserializer:
+        ///   1. TargetTypeForDeserialization
         ///   2. TypeConverter
         /// 
         /// If <paramref name="typeTable"/> is null no custom serialization/deserialization
@@ -527,7 +527,7 @@ namespace System.Management.Automation.Runspaces
 
         /// <summary>
         /// Creates a RunspacePool 
-        /// on the specified remote runspace compuer.
+        /// on the specified remote runspace computer.
         /// <paramref name="maxRunspaces"/>
         /// limits the number of Runspaces that can exist in this
         /// pool. The minimum pool size is set to 
@@ -545,10 +545,10 @@ namespace System.Management.Automation.Runspaces
         /// The TypeTable to use while deserializing/serializing remote objects.
         /// TypeTable has the following information used by serializer:
         ///   1. SerializationMethod
-        ///   2. SerailizationDepth
+        ///   2. SerializationDepth
         ///   3. SpecificSerializationProperties
-        /// TypeTable has the following inforamtion used by deserializer:
-        ///   1. TargetTypeForDeserializaiton
+        /// TypeTable has the following information used by deserializer:
+        ///   1. TargetTypeForDeserialization
         ///   2. TypeConverter
         /// 
         /// If <paramref name="typeTable"/> is null no custom serialization/deserialization
@@ -600,10 +600,10 @@ namespace System.Management.Automation.Runspaces
         /// The TypeTable to use while deserializing/serializing remote objects.
         /// TypeTable has the following information used by serializer:
         ///   1. SerializationMethod
-        ///   2. SerailizationDepth
+        ///   2. SerializationDepth
         ///   3. SpecificSerializationProperties
-        /// TypeTable has the following inforamtion used by deserializer:
-        ///   1. TargetTypeForDeserializaiton
+        /// TypeTable has the following information used by deserializer:
+        ///   1. TargetTypeForDeserialization
         ///   2. TypeConverter
         /// </param>
         /// <param name="host"></param>
@@ -621,10 +621,10 @@ namespace System.Management.Automation.Runspaces
         /// The TypeTable to use while deserializing/serializing remote objects.
         /// TypeTable has the following information used by serializer:
         ///   1. SerializationMethod
-        ///   2. SerailizationDepth
+        ///   2. SerializationDepth
         ///   3. SpecificSerializationProperties
-        /// TypeTable has the following inforamtion used by deserializer:
-        ///   1. TargetTypeForDeserializaiton
+        /// TypeTable has the following information used by deserializer:
+        ///   1. TargetTypeForDeserialization
         ///   2. TypeConverter
         /// </param>
         /// <param name="host"></param>
@@ -647,10 +647,10 @@ namespace System.Management.Automation.Runspaces
         /// The TypeTable to use while deserializing/serializing remote objects.
         /// TypeTable has the following information used by serializer:
         ///   1. SerializationMethod
-        ///   2. SerailizationDepth
+        ///   2. SerializationDepth
         ///   3. SpecificSerializationProperties
-        /// TypeTable has the following inforamtion used by deserializer:
-        ///   1. TargetTypeForDeserializaiton
+        /// TypeTable has the following information used by deserializer:
+        ///   1. TargetTypeForDeserialization
         ///   2. TypeConverter
         /// </param>
         /// <param name="applicationArguments">
diff --git a/src/System.Management.Automation/engine/hostifaces/History.cs b/src/System.Management.Automation/engine/hostifaces/History.cs
index a4bbd0bcd4..37934f19e6 100644
--- a/src/System.Management.Automation/engine/hostifaces/History.cs
+++ b/src/System.Management.Automation/engine/hostifaces/History.cs
@@ -86,7 +86,7 @@ namespace Microsoft.PowerShell.Commands
         }
 
         /// <summary>
-        /// Execution status of assoicated pipeline
+        /// Execution status of associated pipeline
         /// </summary>
         /// <value></value>
         public PipelineState ExecutionStatus
@@ -245,7 +245,7 @@ namespace Microsoft.PowerShell.Commands
         #region ICloneable Members
 
         /// <summary>
-        /// Retuns a clone of this object
+        /// Returns a clone of this object
         /// </summary>
         /// <returns></returns>
         public HistoryInfo Clone()
@@ -326,7 +326,7 @@ namespace Microsoft.PowerShell.Commands
         }
 
         /// <summary>
-        /// Udpate the history entry corresponding to id.
+        /// Update the history entry corresponding to id.
         /// </summary>
         /// <param name="id">id of history entry to be updated</param>
         /// <param name="status">status to be updated</param>
@@ -497,7 +497,7 @@ namespace Microsoft.PowerShell.Commands
                     long index, SmallestID = 0;
                     //if we change the defaulthistory size and when no of entries exceed the size, then 
                     //we need to get the smallest entry in the buffer when we want to clear the oldest entry
-                    //eg if size is 5 and then the enrties can be 7,6,1,2,3
+                    //eg if size is 5 and then the entries can be 7,6,1,2,3
                     if (_capacity != DefaultHistorySize)
                         SmallestID = SmallestIDinBuffer();
                     if (!newest.IsPresent)
@@ -585,7 +585,7 @@ namespace Microsoft.PowerShell.Commands
                 }
                 List<HistoryInfo> cmdlist = new List<HistoryInfo>();
                 long SmallestID = 1;
-                //if buffersize is changes,Get the smallest entry thts not cleared in the buffer
+                //if buffersize is changes,Get the smallest entry that's not cleared in the buffer
                 if (_capacity != DefaultHistorySize)
                     SmallestID = SmallestIDinBuffer();
                 if (count != 0)
@@ -613,7 +613,7 @@ namespace Microsoft.PowerShell.Commands
                         long id = _countEntriesAdded;
                         for (long i = 0; i <= count - 1;)
                         {
-                            //if buffersize is changed,we have to loop from max enttry to min entry thats not cleraed
+                            //if buffersize is changed,we have to loop from max entry to min entry thats not cleared
                             if (_capacity != DefaultHistorySize)
                             {
                                 if (_countEntriesAdded > _capacity)
@@ -1056,7 +1056,7 @@ namespace Microsoft.PowerShell.Commands
             }
             else
             {
-                // The defualt value for _count is the size of the history buffer.
+                // The default value for _count is the size of the history buffer.
                 if (!_countParameterSpecified)
                 {
                     _count = history.Buffercapacity();
@@ -1508,7 +1508,7 @@ namespace Microsoft.PowerShell.Commands
         /// mshObject to be converted to HistoryInfo.
         /// </param>
         /// <returns>
-        /// HistoryInfo object if coversion is successful else null.
+        /// HistoryInfo object if conversion is successful else null.
         /// </returns>
 #pragma warning disable 0162
         private
@@ -1991,7 +1991,7 @@ namespace Microsoft.PowerShell.Commands
 
 
         /// <summary>
-        /// Clears the session history based on the input parametera
+        /// Clears the session history based on the input parameter
         /// <param name="id" >id of the entry to be cleared</param>
         /// <param name="count" > count of entries to be cleared</param>
         /// <param name="cmdline" >cmdline string to be cleared</param>
diff --git a/src/System.Management.Automation/engine/hostifaces/HostUtilities.cs b/src/System.Management.Automation/engine/hostifaces/HostUtilities.cs
index 524ff7172c..31fb225eff 100644
--- a/src/System.Management.Automation/engine/hostifaces/HostUtilities.cs
+++ b/src/System.Management.Automation/engine/hostifaces/HostUtilities.cs
@@ -79,8 +79,8 @@ namespace System.Management.Automation
         /// </summary>
         /// <param name="allUsersAllHosts">The profile file name for all users and all hosts.</param>
         /// <param name="allUsersCurrentHost">The profile file name for all users and current host.</param>
-        /// <param name="currentUserAllHosts">The profile file name for cuurrent user and all hosts.</param>
-        /// <param name="currentUserCurrentHost">The profile  name for cuurrent user and current host.</param>
+        /// <param name="currentUserAllHosts">The profile file name for current user and all hosts.</param>
+        /// <param name="currentUserCurrentHost">The profile  name for current user and current host.</param>
         /// <returns>A PSObject whose base object is currentUserCurrentHost and with notes for the other 4 parameters.</returns>
         internal static PSObject GetDollarProfile(string allUsersAllHosts, string allUsersCurrentHost, string currentUserAllHosts, string currentUserCurrentHost)
         {
diff --git a/src/System.Management.Automation/engine/hostifaces/InternalHost.cs b/src/System.Management.Automation/engine/hostifaces/InternalHost.cs
index 705f87b7c5..27c054c7e0 100644
--- a/src/System.Management.Automation/engine/hostifaces/InternalHost.cs
+++ b/src/System.Management.Automation/engine/hostifaces/InternalHost.cs
@@ -128,7 +128,7 @@ namespace System.Management.Automation.Internal.Host
         /// <value></value>
         /// <exception cref="NotImplementedException">
         /// 
-        ///  when the external host's InstaceId is a zero Guid.
+        ///  when the external host's InstanceId is a zero Guid.
         /// 
         /// </exception>
         public override System.Guid InstanceId
diff --git a/src/System.Management.Automation/engine/hostifaces/InternalHostUserInterface.cs b/src/System.Management.Automation/engine/hostifaces/InternalHostUserInterface.cs
index 4a0ff4fa82..7625a3f1a8 100644
--- a/src/System.Management.Automation/engine/hostifaces/InternalHostUserInterface.cs
+++ b/src/System.Management.Automation/engine/hostifaces/InternalHostUserInterface.cs
@@ -424,7 +424,7 @@ namespace System.Management.Automation.Internal.Host
         /// </exception>
         /// <exception cref="ArgumentException">
         /// 
-        /// If the debug preference is not a valid ActionPrefernce value.
+        /// If the debug preference is not a valid ActionPreference value.
         /// 
         /// </exception>
 
@@ -482,11 +482,11 @@ namespace System.Management.Automation.Internal.Host
         /// </summary>
         /// <param name="informationalBuffers">
         /// Buffers to which Debug, Verbose, Warning, Progress, Information messages
-        /// will be writtern to.
+        /// will be written to.
         /// </param>
         /// <remarks>
         /// This method is not thread safe. Caller should make sure of the
-        /// assosciated risks. 
+        /// associated risks. 
         /// </remarks>
         internal void SetInformationalMessageBuffers(PSInformationalBuffers informationalBuffers)
         {
@@ -910,7 +910,7 @@ namespace System.Management.Automation.Internal.Host
         /// Presents a dialog allowing the user to choose options from a set of options.
         /// </summary>
         /// <param name="caption">
-        /// Caption to preceed or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
+        /// Caption to precede or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
         /// </param>
         /// <param name="message">
         /// A message that describes what the choice is for.
diff --git a/src/System.Management.Automation/engine/hostifaces/LocalConnection.cs b/src/System.Management.Automation/engine/hostifaces/LocalConnection.cs
index 77a245ba82..32cc938deb 100644
--- a/src/System.Management.Automation/engine/hostifaces/LocalConnection.cs
+++ b/src/System.Management.Automation/engine/hostifaces/LocalConnection.cs
@@ -529,7 +529,7 @@ namespace System.Management.Automation.Runspaces
                     }
                     else
                     {
-                        // For wahtever reason, cache is corrupted. Hence override the cache content.
+                        // For whatever reason, cache is corrupted. Hence override the cache content.
                         if (enable)
                         {
                             debugPreferenceCache = new Hashtable();
@@ -604,7 +604,7 @@ namespace System.Management.Automation.Runspaces
         /// Open the runspace
         /// </summary>
         /// <param name="syncCall">
-        /// paramter which control if Open is done synchronously or asynchronously
+        /// parameter which control if Open is done synchronously or asynchronously
         /// </param>
         protected override void OpenHelper(bool syncCall)
         {
@@ -796,7 +796,7 @@ namespace System.Management.Automation.Runspaces
         /// Returns the thread that must be used to execute pipelines when CreateThreadOptions is ReuseThread
         /// </summary>
         /// <remarks>
-        /// The pipeline calls this function after ensuring there is a single thread in the pipeline, so no locking is neccesary
+        /// The pipeline calls this function after ensuring there is a single thread in the pipeline, so no locking is necessary
         /// </remarks>
         internal PipelineThread GetPipelineThread()
         {
diff --git a/src/System.Management.Automation/engine/hostifaces/LocalPipeline.cs b/src/System.Management.Automation/engine/hostifaces/LocalPipeline.cs
index 468734b335..64719a124a 100644
--- a/src/System.Management.Automation/engine/hostifaces/LocalPipeline.cs
+++ b/src/System.Management.Automation/engine/hostifaces/LocalPipeline.cs
@@ -170,7 +170,7 @@ namespace System.Management.Automation.Runspaces
                         }
                         else
                         {
-                            apartmentState = this.LocalRunspace.ApartmentState; // use the Runspace apartmet state
+                            apartmentState = this.LocalRunspace.ApartmentState; // use the Runspace apartment state
                         }
 
                         if (apartmentState != ApartmentState.Unknown)
@@ -821,7 +821,7 @@ namespace System.Management.Automation.Runspaces
         private PipelineStopper _stopper;
 
         /// <summary>
-        /// Gets PipelineStopper object which maitains stack of PipelineProcessor
+        /// Gets PipelineStopper object which maintains stack of PipelineProcessor
         /// for this pipeline
         /// </summary>
         /// <value></value>
@@ -1081,7 +1081,7 @@ namespace System.Management.Automation.Runspaces
         internal
         void AddHistoryEntryFromAddHistoryCmdlet()
         {
-            //This method can be called by mulitple times during a single
+            //This method can be called by multiple times during a single
             //pipeline execution. For ex: a script can execute add-history
             //command multiple times. However we should add entry only 
             //once.
@@ -1129,7 +1129,7 @@ namespace System.Management.Automation.Runspaces
         /// </summary>
         /// <returns>
         /// ExecutionContext, if it available in TLS
-        /// Null, if ExecutionContext is not availalbe in TLS
+        /// Null, if ExecutionContext is not available in TLS
         /// </returns>
         internal static System.Management.Automation.ExecutionContext GetExecutionContextFromTLS()
         {
@@ -1437,7 +1437,7 @@ namespace System.Management.Automation.Runspaces
                     {
                         _stack.Peek().ExecutionFailed = true;
                     }
-                    // If this is the last pipeline processor on the stack, then propigate it's execution status
+                    // If this is the last pipeline processor on the stack, then propagate it's execution status
                     if (_stack.Count == 1 && _localPipeline != null)
                     {
                         _localPipeline.SetHadErrors(oldPipe.ExecutionFailed);
@@ -1460,7 +1460,7 @@ namespace System.Management.Automation.Runspaces
                 copyStack = _stack.ToArray();
             }
 
-            // Propigate error from the toplevel operation through to enclosing the LocalPipeline.
+            // Propagate error from the toplevel operation through to enclosing the LocalPipeline.
             if (copyStack.Length > 0)
             {
                 PipelineProcessor topLevel = copyStack[copyStack.Length - 1];
diff --git a/src/System.Management.Automation/engine/hostifaces/MshHost.cs b/src/System.Management.Automation/engine/hostifaces/MshHost.cs
index d7ac7bae09..1202265d5a 100644
--- a/src/System.Management.Automation/engine/hostifaces/MshHost.cs
+++ b/src/System.Management.Automation/engine/hostifaces/MshHost.cs
@@ -238,9 +238,9 @@ namespace System.Management.Automation.Host
         /// If the UI property returns null, the engine should not call this method.
         /// 
         /// 
-        /// <!--Was: ExecuteSubShell.  "subshell" inplies a new child engine, which is not the case here.  This is called during the 
+        /// <!--Was: ExecuteSubShell.  "subshell" implies a new child engine, which is not the case here.  This is called during the 
         /// interruption of a pipeline to allow nested pipeline(s) to be run as a way to the user to suspend execution while he
-        /// evalautes other commands.  It does not create a truly new engine instance with new session state.-->
+        /// evaluates other commands.  It does not create a truly new engine instance with new session state.-->
         /// 
         /// </remarks>
         /// <seealso cref="System.Management.Automation.Host.PSHost.ExitNestedPrompt"/>
@@ -258,7 +258,7 @@ namespace System.Management.Automation.Host
         /// </summary>
         /// <remarks>
         /// 
-        /// Typicalled called by the engine in response to some user action that resumes a suspended pipeline, such as with the
+        /// Typically called by the engine in response to some user action that resumes a suspended pipeline, such as with the
         /// 'continue-command' intrinsic cmdlet. Before calling this method, the engine should clear out the loop-specific 
         /// variables that were set when the loop was created.
         /// 
@@ -291,7 +291,7 @@ namespace System.Management.Automation.Host
         /// 
         /// If the host is using an in-process Runspace, then the BaseObject property can be a non-null value  a live object. 
         /// No guarantees are made as to the app domain or thread that the BaseObject is accessed if it is accessed in the 
-        /// runspace. No guarantees of threadsafety or re-entrancy are made.  The object set in the BaseObject property of
+        /// runspace. No guarantees of threadsafety or reentrancy are made.  The object set in the BaseObject property of
         /// the value returned by this method is responsible for ensuring its own threadsafety and re-entrance safety.
         /// Note that thread(s) accessing that object may not necessarily be the same from one access to the next.
         /// 
@@ -364,7 +364,7 @@ namespace System.Management.Automation.Host
         /// <summary>
         /// Used by hosting applications to notify PowerShell engine that it is
         /// being hosted in a console based application and the Pipeline execution
-        /// thread should call SetThreadUILanguage(0). This propery is currently
+        /// thread should call SetThreadUILanguage(0). This property is currently
         /// used by ConsoleHost only and in future releases we may consider 
         /// exposing this publicly.
         /// </summary>
diff --git a/src/System.Management.Automation/engine/hostifaces/MshHostRawUserInterface.cs b/src/System.Management.Automation/engine/hostifaces/MshHostRawUserInterface.cs
index 3fb2756fd6..0c8deefd63 100644
--- a/src/System.Management.Automation/engine/hostifaces/MshHostRawUserInterface.cs
+++ b/src/System.Management.Automation/engine/hostifaces/MshHostRawUserInterface.cs
@@ -880,7 +880,7 @@ namespace System.Management.Automation.Host
 
         /// <summary>
         /// 
-        /// Gets and sets the bottom of the rectanngle
+        /// Gets and sets the bottom of the rectangle
         /// 
         /// </summary>
 
@@ -909,7 +909,7 @@ namespace System.Management.Automation.Host
         /// </param>
         /// <param name="bottom">
         /// 
-        /// The bottom of the rectanngle
+        /// The bottom of the rectangle
         /// 
         /// </param>
         /// <exception cref="ArgumentException">
@@ -2145,7 +2145,7 @@ namespace System.Management.Automation.Host
         /// equal to the largest number of cells a string in <paramref name="contents"/> takes. The
         /// foreground and background colors of the cells are initialized to
         /// <paramref name="foregroundColor"/> and <paramref name="backgroundColor"/>, respectively.
-        /// The resuling array is suitable for use with <see cref="PSHostRawUserInterface.SetBufferContents(Rectangle, BufferCell)"/>
+        /// The resulting array is suitable for use with <see cref="PSHostRawUserInterface.SetBufferContents(Rectangle, BufferCell)"/>
         /// and <see cref="PSHostRawUserInterface.SetBufferContents(Coordinates, BufferCell[,])"/>.
         /// 
         /// </remark>
diff --git a/src/System.Management.Automation/engine/hostifaces/MshHostUserInterface.cs b/src/System.Management.Automation/engine/hostifaces/MshHostUserInterface.cs
index 67b844ba12..29a9f4e49d 100644
--- a/src/System.Management.Automation/engine/hostifaces/MshHostUserInterface.cs
+++ b/src/System.Management.Automation/engine/hostifaces/MshHostUserInterface.cs
@@ -237,7 +237,7 @@ namespace System.Management.Automation.Host
         // 
         // Ideally, this would be associated with the host instance, but remoting recycles host instances
         // for each command that gets invoked (so that it can keep track of the order of commands and their
-        // output.) Therefore, we store this transcripton data in the runspace. However, the
+        // output.) Therefore, we store this transcription data in the runspace. However, the
         // Runspace.DefaultRunspace property isn't always available (i.e.: when the pipeline is being set up),
         // so we have to cache it the first time it becomes available.
         private TranscriptionData TranscriptionData
@@ -721,7 +721,7 @@ namespace System.Management.Automation.Host
         /// Constructs a 'dialog' where the user is presented with a number of fields for which to supply values.
         /// </summary>
         /// <param name="caption">
-        /// Caption to preceed or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
+        /// Caption to precede or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
         /// </param>
         /// <param name="message">
         /// A text description of the set of fields to be prompt.
@@ -733,7 +733,7 @@ namespace System.Management.Automation.Host
         /// A Dictionary object with results of prompting.  The keys are the field names from the FieldDescriptions, the values
         /// are objects representing the values of the corresponding fields as collected from the user. To the extent possible, 
         /// the host should return values of the type(s) identified in the FieldDescription.  When that is not possible (for 
-        /// example, the type is not avaiable to the host), the host should return the value as a string.
+        /// example, the type is not available to the host), the host should return the value as a string.
         /// </returns>
         /// <seealso cref="System.Management.Automation.Host.PSHostUserInterface.ReadLine"/>
         /// <seealso cref="System.Management.Automation.Host.PSHostUserInterface.ReadLineAsSecureString"/>
@@ -815,7 +815,7 @@ namespace System.Management.Automation.Host
         /// Presents a dialog allowing the user to choose an option from a set of options.
         /// </summary>
         /// <param name="caption">
-        /// Caption to preceed or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
+        /// Caption to precede or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
         /// </param>
         /// <param name="message">
         /// A message that describes what the choice is for.
@@ -1145,7 +1145,7 @@ namespace System.Management.Automation.Host
         /// Presents a dialog allowing the user to choose options from a set of options.
         /// </summary>
         /// <param name="caption">
-        /// Caption to preceed or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
+        /// Caption to precede or title the prompt.  E.g. "Parameters for get-foo (instance 1 of 2)"
         /// </param>
         /// <param name="message">
         /// A message that describes what the choice is for.
diff --git a/src/System.Management.Automation/engine/hostifaces/NativeCultureResolver.cs b/src/System.Management.Automation/engine/hostifaces/NativeCultureResolver.cs
index 9ee1e02365..b752f3ca84 100644
--- a/src/System.Management.Automation/engine/hostifaces/NativeCultureResolver.cs
+++ b/src/System.Management.Automation/engine/hostifaces/NativeCultureResolver.cs
@@ -1,7 +1,7 @@
 /********************************************************************++
 Copyright (c) Microsoft Corporation.  All rights reserved.
  
-Descripton: 
+Description: 
  
 Windows Vista and later support non-traditional UI fallback ie., a 
 user on an Arabic machine can choose either French or English(US) as
@@ -61,8 +61,8 @@ namespace Microsoft.PowerShell
         {
             get
             {
-                // First traverse the parent heirarchy as established by CLR.
-                // This is required because there is difference in the parent heirarchy
+                // First traverse the parent hierarchy as established by CLR.
+                // This is required because there is difference in the parent hierarchy
                 // between CLR and Windows for Chinese. Ex: Native windows has
                 // zh-CN->zh-Hans->neutral whereas CLR has zh-CN->zh-CHS->zh-Hans->neutral
                 if ((null != base.Parent) && (!string.IsNullOrEmpty(base.Parent.Name)))
@@ -120,7 +120,7 @@ namespace Microsoft.PowerShell
                         {
                             string parentCulture = base.Parent.Name;
                             // remove the parentCulture from the m_fallbacks list.
-                            // ie., remove duplicates from the parent heirarchy.
+                            // ie., remove duplicates from the parent hierarchy.
                             string[] fallbacksForTheParent = null;
                             if (null != _fallbacks)
                             {
@@ -135,7 +135,7 @@ namespace Microsoft.PowerShell
                                     }
                                 }
 
-                                // There is atlease 1 duplicate in m_fallbacks which was not added to
+                                // There is atleast 1 duplicate in m_fallbacks which was not added to
                                 // fallbacksForTheParent array. Resize the array to take care of  this.
                                 if (_fallbacks.Length != currentIndex)
                                 {
@@ -290,7 +290,7 @@ namespace Microsoft.PowerShell
                     // filter out languages that console cannot display..
                     // Sometimes GetConsoleFallbackUICulture returns neutral cultures
                     // like "en" on "ar-SA". However neutral culture cannot be 
-                    // asssigned as CurrentCulture. CreateSpecificCulture fixes
+                    // assigned as CurrentCulture. CreateSpecificCulture fixes
                     // this problem.
                     returnValue = CultureInfo.CreateSpecificCulture(
                         returnValue.GetConsoleFallbackUICulture().Name);
@@ -352,7 +352,7 @@ namespace Microsoft.PowerShell
         /// the UI languages a user has chosen.
         /// </summary>
         /// <returns>
-        /// List of ThredPreferredUILanguages.
+        /// List of ThreadPreferredUILanguages.
         /// </returns>
         /// <remarks>
         /// This method will work only on Vista and later.
@@ -367,7 +367,7 @@ namespace Microsoft.PowerShell
             if (filterOutNonConsoleCultures)
             {
                 // Filter out languages that do not support console.
-                // The third paramter should be null otherwise this API will not 
+                // The third parameter should be null otherwise this API will not 
                 // set Console CodePage filter.
                 // The MSDN documentation does not call this out explicitly. Opened
                 // Bug 950 (Windows Developer Content) to track this.
@@ -451,7 +451,7 @@ namespace Microsoft.PowerShell
         /// <returns>
         /// Returns the size of the buffer containing the locale name, including 
         /// the terminating null character, if successful. The function returns 0 
-        /// if it does not succeed. To get extended error information, the applciation
+        /// if it does not succeed. To get extended error information, the application
         /// can call GetLastError. Possible returns from GetLastError
         /// include ERR_INSUFFICIENT_BUFFER.
         /// </returns>
diff --git a/src/System.Management.Automation/engine/hostifaces/PSDataCollection.cs b/src/System.Management.Automation/engine/hostifaces/PSDataCollection.cs
index 10815782ca..3e6634e1b9 100644
--- a/src/System.Management.Automation/engine/hostifaces/PSDataCollection.cs
+++ b/src/System.Management.Automation/engine/hostifaces/PSDataCollection.cs
@@ -316,7 +316,7 @@ namespace System.Management.Automation
         /// as the data buffer.
         /// </summary>
         /// <param name="listToUse">
-        /// buffer wherer the elements are stored
+        /// buffer where the elements are stored
         /// </param>
         /// <remarks>
         /// Using this constructor will make the data buffer a wrapper on
@@ -534,7 +534,7 @@ namespace System.Management.Automation
                     {
                         _isOpen = false;
                         raiseEvents = true;
-                        // release any threads to notify an event. Enumertor
+                        // release any threads to notify an event. Enumerator
                         // blocks on this syncObject.
                         Monitor.PulseAll(SyncObject);
 
@@ -1363,7 +1363,7 @@ namespace System.Management.Automation
                         _readWaitHandle.Reset();
                     }
                 }
-                // release any threads to notify an event. Enumertor
+                // release any threads to notify an event. Enumerator
                 // blocks on this syncObject.
                 Monitor.PulseAll(SyncObject);
 
@@ -1525,7 +1525,7 @@ namespace System.Management.Automation
                 {
                     InsertItem(psInstanceId, _data.Count, (T)o);
 
-                    // set raise events if atlease one item is
+                    // set raise events if atleast one item is
                     // added.
                     raiseEvents = true;
                 }
@@ -1568,7 +1568,7 @@ namespace System.Management.Automation
                     _readWaitHandle.Set();
                 }
 
-                // release any threads to notify refCount is 0. Enumertor
+                // release any threads to notify refCount is 0. Enumerator
                 // blocks on this syncObject and it needs to be notified
                 // when the count becomes 0. 
                 Monitor.PulseAll(SyncObject);
@@ -1576,7 +1576,7 @@ namespace System.Management.Automation
         }
 
         /// <summary>
-        /// Returns the index of first occurece of <paramref name="item"/>
+        /// Returns the index of first occurrence of <paramref name="item"/>
         /// in the buffer. 
         /// This method is not thread safe.
         /// </summary>
@@ -1822,7 +1822,7 @@ namespace System.Management.Automation
 
     /// <summary>
     /// Enumerator for PSDataCollection. This enumerator blocks until 
-    /// either all the PowerShell operations are compeleted or the
+    /// either all the PowerShell operations are completed or the
     /// PSDataCollection is closed.
     /// </summary>
     /// <typeparam name="W"></typeparam>
@@ -2006,7 +2006,7 @@ namespace System.Management.Automation
         /// </summary>
         /// <param name="psInstanceId">
         /// Guid of Powershell instance creating this buffers.
-        /// Whenver an item is added to one of the buffers, this id is
+        /// Whenever an item is added to one of the buffers, this id is
         /// used to notify the buffer about the PowerShell instance adding
         /// this data.
         /// </param>
diff --git a/src/System.Management.Automation/engine/hostifaces/Pipeline.cs b/src/System.Management.Automation/engine/hostifaces/Pipeline.cs
index ce8a557a11..e941ad6737 100644
--- a/src/System.Management.Automation/engine/hostifaces/Pipeline.cs
+++ b/src/System.Management.Automation/engine/hostifaces/Pipeline.cs
@@ -115,7 +115,7 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// State of pipleine when exception was thrown.
+        /// State of pipeline when exception was thrown.
         /// </summary>
         [NonSerialized]
         private PipelineState _currentState = 0;
@@ -397,7 +397,7 @@ namespace System.Management.Automation.Runspaces
 
         /// <summary>
         /// True if pipeline execution encountered and error.
-        /// It will alwys be true if _reason is non-null
+        /// It will always be true if _reason is non-null
         /// since an exception occurred. For other error types,
         /// It has to be set manually.
         /// </summary>
@@ -413,7 +413,7 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// gets the unique identifier for this pipeline. This indentifier is unique with in
+        /// gets the unique identifier for this pipeline. This identifier is unique with in
         /// the scope of Runspace.
         /// </summary>
         public long InstanceId { get; }
@@ -444,7 +444,7 @@ namespace System.Management.Automation.Runspaces
         /// On V1, the global error output pipe is redirected to the command's error output pipe only when 
         /// it has already been redirected. The command-line host achieves this redirection by merging the
         /// error output into the output pipe so it checks $ErrorActionPreference all right. However, when 
-        /// the Pipeline class is used programatically the global error output pipe is not set and the first
+        /// the Pipeline class is used programmatically the global error output pipe is not set and the first
         /// error terminates the pipeline.
         /// 
         /// This flag is used to force the redirection. By default it is false to maintain compatibility with
@@ -500,7 +500,7 @@ namespace System.Management.Automation.Runspaces
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the pipeline was executing was aborted.
@@ -571,7 +571,7 @@ namespace System.Management.Automation.Runspaces
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the pipeline was executing was aborted.
diff --git a/src/System.Management.Automation/engine/hostifaces/PowerShell.cs b/src/System.Management.Automation/engine/hostifaces/PowerShell.cs
index bd74a8a1c9..2a16aaa59f 100644
--- a/src/System.Management.Automation/engine/hostifaces/PowerShell.cs
+++ b/src/System.Management.Automation/engine/hostifaces/PowerShell.cs
@@ -529,7 +529,7 @@ namespace System.Management.Automation
         /// Constructor
         /// </summary>
         /// <param name="ownerId">
-        /// Instace Id of the Powershell object creating this instance
+        /// Instance Id of the Powershell object creating this instance
         /// </param>
         /// <param name="callback">
         /// Callback to call when the async operation completes.
@@ -567,7 +567,7 @@ namespace System.Management.Automation
     /// <code>
     ///    Powershell.Create("get-process").Invoke();
     /// </code>
-    /// The above statetement creates a local runspace using default
+    /// The above statement creates a local runspace using default
     /// configuration, executes the command and then closes the runspace.
     /// 
     /// Using RunspacePool property, the caller can provide the runspace
@@ -1672,7 +1672,7 @@ namespace System.Management.Automation
         internal bool RedirectShellErrorOutputPipe { get; set; } = true;
 
         /// <summary>
-        /// Get unqiue id for this instance of runspace pool. It is primarily used 
+        /// Get unique id for this instance of runspace pool. It is primarily used 
         /// for logging purposes.
         /// </summary>
         public Guid InstanceId { get; private set; }
@@ -1710,7 +1710,7 @@ namespace System.Management.Automation
         }
 
         /// <summary>
-        /// Access to the EndInvoke AysncResult object.  Used by remote
+        /// Access to the EndInvoke AsyncResult object.  Used by remote
         /// debugging to invoke debugger commands on command thread.
         /// </summary>
         internal AsyncResult EndInvokeAsyncResult
@@ -1720,7 +1720,7 @@ namespace System.Management.Automation
         }
 
         /// <summary>
-        /// Event rasied when PowerShell Execution State Changes.
+        /// Event raised when PowerShell Execution State Changes.
         /// </summary>
         public event EventHandler<PSInvocationStateChangedEventArgs> InvocationStateChanged;
 
@@ -2212,7 +2212,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2274,7 +2274,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2339,7 +2339,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2401,7 +2401,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2467,7 +2467,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2534,7 +2534,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2604,7 +2604,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2670,7 +2670,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -2744,7 +2744,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -4161,7 +4161,7 @@ namespace System.Management.Automation
         /// <exception cref="System.Security.SecurityException">
         /// A CLR security violation occurred.  Typically, this happens
         /// because the current CLR permissions do not allow adequate
-        /// reflextion access to a cmdlet assembly.
+        /// reflection access to a cmdlet assembly.
         /// </exception>
         /// <exception cref="ThreadAbortException">
         /// The thread in which the command was executing was aborted.
@@ -4271,7 +4271,7 @@ namespace System.Management.Automation
                         "Nested PowerShell can only work on a Runspace");
 
 
-                    // Peform work on the current thread. Nested Pipeline
+                    // Perform work on the current thread. Nested Pipeline
                     // should be invoked from the same thread that the parent
                     // pipeline is executing in.
                     _worker.ConstructPipelineAndDoWork(rsToUse, true);
@@ -4415,7 +4415,7 @@ namespace System.Management.Automation
                                 throw;
                             }
 
-                            // Ignore the exception if neccessary.
+                            // Ignore the exception if necessary.
                             if ((null != settings) && settings.ErrorActionPreference == ActionPreference.Ignore)
                             {
                                 continue;
@@ -5179,7 +5179,7 @@ namespace System.Management.Automation
             /// <summary>
             /// This method gets called from a ThreadPool thread.
             /// This method gets called from a RunspacePool thread when a
-            /// Runsapce is available.
+            /// Runspace is available.
             /// </summary>
             /// <param name="asyncResult">
             /// AsyncResult object which monitors the asyncOperation.
diff --git a/src/System.Management.Automation/engine/hostifaces/PowerShellProcessInstance.cs b/src/System.Management.Automation/engine/hostifaces/PowerShellProcessInstance.cs
index fb90be8243..d0c6ed3c17 100644
--- a/src/System.Management.Automation/engine/hostifaces/PowerShellProcessInstance.cs
+++ b/src/System.Management.Automation/engine/hostifaces/PowerShellProcessInstance.cs
@@ -140,7 +140,7 @@ namespace System.Management.Automation.Runspaces
         {
             get
             {
-                // When process is exited, there is some delay in receiving ProcesExited event and HasExited property on process object.
+                // When process is exited, there is some delay in receiving ProcessExited event and HasExited property on process object.
                 // Using HasExited property on started process object to determine if powershell process has exited. 
                 //                
                 return _processExited || (_started && Process != null && Process.HasExited);
diff --git a/src/System.Management.Automation/engine/hostifaces/RunspacePool.cs b/src/System.Management.Automation/engine/hostifaces/RunspacePool.cs
index 6981b0795d..1a4f070999 100644
--- a/src/System.Management.Automation/engine/hostifaces/RunspacePool.cs
+++ b/src/System.Management.Automation/engine/hostifaces/RunspacePool.cs
@@ -355,7 +355,7 @@ namespace System.Management.Automation.Runspaces
     public enum RunspacePoolCapability
     {
         /// <summary>
-        /// No additional capabilites beyond a default runspace.
+        /// No additional capabilities beyond a default runspace.
         /// </summary>
         Default = 0x0,
 
@@ -384,7 +384,7 @@ namespace System.Management.Automation.Runspaces
         /// Constructor
         /// </summary>
         /// <param name="ownerId">
-        /// Instace Id of the pool creating this instance
+        /// Instance Id of the pool creating this instance
         /// </param>
         /// <param name="callback">
         /// Callback to call when the async operation completes.
@@ -433,7 +433,7 @@ namespace System.Management.Automation.Runspaces
         /// Constructor
         /// </summary>
         /// <param name="ownerId">
-        /// Instace Id of the pool creating this instance
+        /// Instance Id of the pool creating this instance
         /// </param>
         /// <param name="callback">
         /// Callback to call when the async operation completes.
@@ -649,7 +649,7 @@ namespace System.Management.Automation.Runspaces
             PSHost host,
             TypeTable typeTable)
         {
-            // Disconnect-Connect semantics are currently only suppored in WSMan transport.
+            // Disconnect-Connect semantics are currently only supported in WSMan transport.
             if (!(connectionInfo is WSManConnectionInfo))
             {
                 throw new NotSupportedException();
@@ -666,7 +666,7 @@ namespace System.Management.Automation.Runspaces
         #region Public Properties
 
         /// <summary>
-        /// Get unqiue id for this instance of runspace pool. It is primarily used 
+        /// Get unique id for this instance of runspace pool. It is primarily used 
         /// for logging purposes.
         /// </summary>
         public Guid InstanceId
@@ -689,7 +689,7 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// Gets State of the current runpsace pool.
+        /// Gets State of the current runspace pool.
         /// </summary>
         public RunspacePoolStateInfo RunspacePoolStateInfo
         {
@@ -859,7 +859,7 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// Event rasied when a new Runspace is created by the pool.
+        /// Event raised when a new Runspace is created by the pool.
         /// </summary>
         internal event EventHandler<RunspaceCreatedEventArgs> RunspaceCreated
         {
@@ -1331,7 +1331,7 @@ namespace System.Management.Automation.Runspaces
         }
 
         /// <summary>
-        /// Waits for the pending asynchronous BegineGetRunspace to complete. 
+        /// Waits for the pending asynchronous BeginGetRunspace to complete. 
         /// </summary>
         /// <param name="asyncResult">
         /// </param>
diff --git a/src/System.Management.Automation/engine/hostifaces/RunspacePoolInternal.cs b/src/System.Management.Automation/engine/hostifaces/RunspacePoolInternal.cs
index 16f38d0782..f75104f2c3 100644
--- a/src/System.Management.Automation/engine/hostifaces/RunspacePoolInternal.cs
+++ b/src/System.Management.Automation/engine/hostifaces/RunspacePoolInternal.cs
@@ -201,7 +201,7 @@ namespace System.Management.Automation.Runspaces.Internal
         #region Public Properties
 
         /// <summary>
-        /// Get unqiue id for this instance of runspace pool. It is primarily used 
+        /// Get unique id for this instance of runspace pool. It is primarily used 
         /// for logging purposes.
         /// </summary>
         public Guid InstanceId
@@ -224,7 +224,7 @@ namespace System.Management.Automation.Runspaces.Internal
         }
 
         /// <summary>
-        /// Gets State of the current runpsace pool.
+        /// Gets State of the current runspace pool.
         /// </summary>
         public RunspacePoolStateInfo RunspacePoolStateInfo
         {
@@ -340,7 +340,7 @@ namespace System.Management.Automation.Runspaces.Internal
         public event EventHandler<PSEventArgs> ForwardEvent;
 
         /// <summary>
-        /// Event rasied when a new Runspace is created by the pool.
+        /// Event raised when a new Runspace is created by the pool.
         /// </summary>
         internal event EventHandler<RunspaceCreatedEventArgs> RunspaceCreated;
 
@@ -937,7 +937,7 @@ namespace System.Management.Automation.Runspaces.Internal
         }
 
         /// <summary>
-        /// Waits for the pending asynchronous BegineGetRunspace to complete. 
+        /// Waits for the pending asynchronous BeginGetRunspace to complete. 
         /// </summary>
         /// <param name="asyncResult">
         /// </param>
diff --git a/src/System.Management.Automation/engine/hostifaces/pipelinebase.cs b/src/System.Management.Automation/engine/hostifaces/pipelinebase.cs
index 997f59fefe..3d2edc7161 100644
--- a/src/System.Management.Automation/engine/hostifaces/pipelinebase.cs
+++ b/src/System.Management.Automation/engine/hostifaces/pipelinebase.cs
@@ -389,7 +389,7 @@ namespace System.Management.Automation.Runspaces
             if (SyncInvokeCall)
             {
                 //Raise the pipeline completion events. These events are set in
-                //pipeline execution thread. However for Synchornous execution
+                //pipeline execution thread. However for Synchronous execution
                 //we raise the event in the main thread.
                 RaisePipelineStateEvents();
             }
@@ -526,7 +526,7 @@ namespace System.Management.Automation.Runspaces
                 RunspaceBase.DoConcurrentCheckAndAddToRunningPipelines(this, syncCall);
 
                 //Note: Set PipelineState to Running only after adding pipeline to list
-                //of pipelines in exectuion. AddForExecution checks that runspace is in
+                //of pipelines in execution. AddForExecution checks that runspace is in
                 //state where pipeline can be run.
                 //StartPipelineExecution raises this event. See Windows Bug 1160481 for
                 //more details.
@@ -591,7 +591,7 @@ namespace System.Management.Automation.Runspaces
         /// In case of LocalPipeline, this is the thread of execution
         /// of LocalPipeline. In case of RemotePipeline, this is thread
         /// on which EnterNestedPrompt is called.
-        /// RemotePipeline proxy should set it on at the begining of 
+        /// RemotePipeline proxy should set it on at the beginning of 
         /// EnterNestedPrompt and clear it on return.
         /// </summary>
         internal Thread NestedPipelineExecutionThread { get; set; }
@@ -604,7 +604,7 @@ namespace System.Management.Automation.Runspaces
         /// <param name="syncCall">True if method is called from Invoke, false
         /// if called from InvokeAsync</param>
         /// <param name="syncObject">The sync object on which the lock is acquired</param>
-        /// <param name="isInLock">True if the method is invoked in a critical secion</param>
+        /// <param name="isInLock">True if the method is invoked in a critical section</param>
         /// <exception cref="InvalidOperationException">
         /// 1) A pipeline is already executing. Pipeline cannot execute 
         /// concurrently.
@@ -871,7 +871,7 @@ namespace System.Management.Automation.Runspaces
 
                     // this is shipped as part of V1. So disabling the warning here.
 #pragma warning disable 56500
-                    //Exception rasied in the eventhandler are not error in pipeline.
+                    //Exception raised in the eventhandler are not error in pipeline.
                     //silently ignore them.
                     if (stateChanged != null)
                     {