diff --git a/src/System.Management.Automation/engine/ComInterop/ComEventSink.cs b/src/System.Management.Automation/engine/ComInterop/ComEventSink.cs
index 5a873a5814..cc9269f9a3 100644
--- a/src/System.Management.Automation/engine/ComInterop/ComEventSink.cs
+++ b/src/System.Management.Automation/engine/ComInterop/ComEventSink.cs
@@ -18,11 +18,11 @@ namespace System.Management.Automation.ComInterop
     /// This class implements an event sink for a particular RCW.
     /// Unlike the implementation of events in TlbImp'd assemblies,
     /// we will create only one event sink per RCW (theoretically RCW might have
-    /// several ComEventSink evenk sinks - but all these implement different source intefaces).
+    /// several ComEventSink evenk sinks - but all these implement different source interfaces).
     /// Each ComEventSink contains a list of ComEventSinkMethod objects - which represent
     /// a single method on the source interface an a multicast delegate to redirect 
     /// the calls. Notice that we are chaining multicast delegates so that same 
-    /// ComEventSinkMedhod can invoke multiple event handlers).
+    /// ComEventSinkMethod can invoke multiple event handlers).
     /// 
     /// ComEventSink implements an IDisposable pattern to Unadvise from the connection point.
     /// Typically, when RCW is finalized the corresponding Dispose will be triggered by 
diff --git a/src/System.Management.Automation/engine/ComInterop/ComEventSinkProxy.cs b/src/System.Management.Automation/engine/ComInterop/ComEventSinkProxy.cs
index d2c2abb53b..1d7697ecfc 100644
--- a/src/System.Management.Automation/engine/ComInterop/ComEventSinkProxy.cs
+++ b/src/System.Management.Automation/engine/ComInterop/ComEventSinkProxy.cs
@@ -29,11 +29,11 @@ namespace System.Management.Automation.ComInterop
     /// ComEventSink does not, strongly speaking, implements the interface 
     /// that it claims to implement - it is just "faking" it by using IReflect.
     /// Thus, Word's QIs on the pointer passed to ICP::Advise would fail. To
-    /// prevent this we take advangate of RealProxy's ability of
+    /// prevent this we take advantage of RealProxy's ability of
     /// "dressing up" like other classes and hence successfully respond to QIs 
     /// for interfaces that it does not really support( it is OK to say 
     /// "I implement this interface" for event sinks only since the common 
-    /// practice is to use IDistpach.Invoke when calling into event sinks). 
+    /// practice is to use IDispatch.Invoke when calling into event sinks). 
     /// </summary>
     internal sealed class ComEventSinkProxy : RealProxy
     {
diff --git a/src/System.Management.Automation/engine/ComInterop/ComInvokeBinder.cs b/src/System.Management.Automation/engine/ComInterop/ComInvokeBinder.cs
index 95d8c078ef..4559b9702d 100644
--- a/src/System.Management.Automation/engine/ComInterop/ComInvokeBinder.cs
+++ b/src/System.Management.Automation/engine/ComInterop/ComInvokeBinder.cs
@@ -31,7 +31,7 @@ namespace System.Management.Automation.ComInterop
 
         private VarEnumSelector _varEnumSelector;
         private string[] _keywordArgNames;
-        private int _totalExplicitArgs; // Includes the individial elements of ArgumentKind.Dictionary (if any)
+        private int _totalExplicitArgs; // Includes the individual elements of ArgumentKind.Dictionary (if any)
 
         private ParameterExpression _dispatchObject;
         private ParameterExpression _dispatchPointer;
@@ -249,7 +249,7 @@ namespace System.Management.Automation.ComInterop
                 }
                 else
                 {
-                    // Positial arguments are in reverse order at the tail of rgArgs
+                    // Positional arguments are in reverse order at the tail of rgArgs
                     variantIndex = reverseIndex;
                 }
                 VariantBuilder variantBuilder = _varEnumSelector.VariantBuilders[i];
diff --git a/src/System.Management.Automation/engine/ComInterop/ComParamDesc.cs b/src/System.Management.Automation/engine/ComInterop/ComParamDesc.cs
index 07d096733a..9f61c8539d 100644
--- a/src/System.Management.Automation/engine/ComInterop/ComParamDesc.cs
+++ b/src/System.Management.Automation/engine/ComInterop/ComParamDesc.cs
@@ -26,7 +26,7 @@ namespace System.Management.Automation.ComInterop
         # region ctor
 
         /// <summary>
-        /// Creates a representation for the paramter of a COM method
+        /// Creates a representation for the parameter of a COM method
         /// </summary>
         internal ComParamDesc(ref ELEMDESC elemDesc, string name)
         {
diff --git a/src/System.Management.Automation/engine/ComInterop/ComTypeLibDesc.cs b/src/System.Management.Automation/engine/ComInterop/ComTypeLibDesc.cs
index 52f7411d4d..95edb22f76 100644
--- a/src/System.Management.Automation/engine/ComInterop/ComTypeLibDesc.cs
+++ b/src/System.Management.Automation/engine/ComInterop/ComTypeLibDesc.cs
@@ -59,7 +59,7 @@ namespace System.Management.Automation.ComInterop
 
         /// <summary>
         /// Reads the latest registered type library for the corresponding GUID,
-        /// reads definitions of CoClass'es and Enum's from this library
+        /// reads definitions of CoClasses and Enum's from this library
         /// and creates a IDynamicMetaObjectProvider that allows to instantiate coclasses
         /// and get actual values for the enums.
         /// </summary>
@@ -78,7 +78,7 @@ namespace System.Management.Automation.ComInterop
 
         /// <summary>
         /// Gets an ITypeLib object from OLE Automation compatible RCW ,
-        /// reads definitions of CoClass'es and Enum's from this library
+        /// reads definitions of CoClasses and Enum's from this library
         /// and creates a IDynamicMetaObjectProvider that allows to instantiate coclasses
         /// and get actual values for the enums.
         /// </summary>
diff --git a/src/System.Management.Automation/engine/ComInterop/IDispatchComObject.cs b/src/System.Management.Automation/engine/ComInterop/IDispatchComObject.cs
index 200290818f..47c35d0ebc 100644
--- a/src/System.Management.Automation/engine/ComInterop/IDispatchComObject.cs
+++ b/src/System.Management.Automation/engine/ComInterop/IDispatchComObject.cs
@@ -129,9 +129,9 @@ namespace System.Management.Automation.ComInterop
         private static int GetIDsOfNames(IDispatch dispatch, string name, out int dispId)
         {
             int[] dispIds = new int[1];
-            Guid emtpyRiid = Guid.Empty;
+            Guid emptyRiid = Guid.Empty;
             int hresult = dispatch.TryGetIDsOfNames(
-                ref emtpyRiid,
+                ref emptyRiid,
                 new string[] { name },
                 1,
                 0,
@@ -143,13 +143,13 @@ namespace System.Management.Automation.ComInterop
 
         private static int Invoke(IDispatch dispatch, int memberDispId, out object result)
         {
-            Guid emtpyRiid = Guid.Empty;
+            Guid emptyRiid = Guid.Empty;
             ComTypes.DISPPARAMS dispParams = new ComTypes.DISPPARAMS();
             ComTypes.EXCEPINFO excepInfo = new ComTypes.EXCEPINFO();
             uint argErr;
             int hresult = dispatch.TryInvoke(
                 memberDispId,
-                ref emtpyRiid,
+                ref emptyRiid,
                 0,
                 ComTypes.INVOKEKIND.INVOKE_PROPERTYGET,
                 ref dispParams,
@@ -491,7 +491,7 @@ namespace System.Management.Automation.ComInterop
 
                     // Sometimes coclass has multiple source interfaces. Usually this is caused by
                     // adding new events and putting them on new interfaces while keeping the
-                    // old interfaces around. This may cause name collisioning which we are
+                    // old interfaces around. This may cause name collisions which we are
                     // resolving by keeping only the first event with the same name.
                     if (events.ContainsKey(name) == false)
                     {
diff --git a/src/System.Management.Automation/engine/ComInterop/VarEnumSelector.cs b/src/System.Management.Automation/engine/ComInterop/VarEnumSelector.cs
index 9bb7bed8df..14ea42e742 100644
--- a/src/System.Management.Automation/engine/ComInterop/VarEnumSelector.cs
+++ b/src/System.Management.Automation/engine/ComInterop/VarEnumSelector.cs
@@ -489,7 +489,7 @@ namespace System.Management.Automation.ComInterop
         }
 
 
-        // This helper is called when we are looking for a ByVal marhsalling
+        // This helper is called when we are looking for a ByVal marshalling
         // In a ByVal case we can take into account conversions or IConvertible if all other 
         // attempts to find marshalling type failed 
         private static ArgBuilder GetByValArgBuilder(Type elementType, ref VarEnum elementVarEnum)
diff --git a/src/System.Management.Automation/engine/ComInterop/VariantArray.cs b/src/System.Management.Automation/engine/ComInterop/VariantArray.cs
index 4bf2b6b874..742b9bb847 100644
--- a/src/System.Management.Automation/engine/ComInterop/VariantArray.cs
+++ b/src/System.Management.Automation/engine/ComInterop/VariantArray.cs
@@ -51,7 +51,7 @@ namespace System.Management.Automation.ComInterop
     internal static class VariantArray
     {
         // Don't need a dictionary for this, it will have very few elements
-        // (guarenteed less than 28, in practice 0-2)
+        // (guaranteed less than 28, in practice 0-2)
         private static readonly List<Type> s_generatedTypes = new List<Type>(0);
 
         internal static MemberExpression GetStructField(ParameterExpression variantArray, int field)