diff --git a/src/Microsoft.PowerShell.Commands.Management/commands/management/Computer.cs b/src/Microsoft.PowerShell.Commands.Management/commands/management/Computer.cs
index 36150e18e1..97785dab99 100644
--- a/src/Microsoft.PowerShell.Commands.Management/commands/management/Computer.cs
+++ b/src/Microsoft.PowerShell.Commands.Management/commands/management/Computer.cs
@@ -1808,7 +1808,7 @@ $result
             }
             else
             {
-                int dotIndex = computerName.IndexOf(".", StringComparison.OrdinalIgnoreCase);
+                int dotIndex = computerName.IndexOf('.');
                 if (dotIndex == -1)
                 {
                     localUserName = computerName + "\\" + psLocalCredential.UserName;
diff --git a/src/Microsoft.PowerShell.Commands.Management/commands/management/ControlPanelItemCommand.cs b/src/Microsoft.PowerShell.Commands.Management/commands/management/ControlPanelItemCommand.cs
index aa07697cd9..c2798b03f5 100644
--- a/src/Microsoft.PowerShell.Commands.Management/commands/management/ControlPanelItemCommand.cs
+++ b/src/Microsoft.PowerShell.Commands.Management/commands/management/ControlPanelItemCommand.cs
@@ -227,7 +227,7 @@ $result
                 {
                     string canonicalName = (string)item.ExtendedProperty("System.ApplicationName");
                     canonicalName = !string.IsNullOrEmpty(canonicalName)
-                                        ? canonicalName.Substring(0, canonicalName.IndexOf("\0", StringComparison.OrdinalIgnoreCase))
+                                        ? canonicalName.Substring(0, canonicalName.IndexOf('\0'))
                                         : null;
 
                     if (canonicalName != null && canonicalName.Equals(RegionCanonicalName, StringComparison.OrdinalIgnoreCase))
@@ -452,7 +452,7 @@ $result
                     string path = item.Path;
                     string canonicalName = (string)item.ExtendedProperty("System.ApplicationName");
                     canonicalName = canonicalName != null
-                                        ? canonicalName.Substring(0, canonicalName.IndexOf("\0", StringComparison.OrdinalIgnoreCase))
+                                        ? canonicalName.Substring(0, canonicalName.IndexOf('\0'))
                                         : null;
 
                     if (canonicalName == null)
@@ -640,7 +640,7 @@ $result
                 string description = (string)item.ExtendedProperty("InfoTip");
                 string canonicalName = (string)item.ExtendedProperty("System.ApplicationName");
                 canonicalName = canonicalName != null
-                                        ? canonicalName.Substring(0, canonicalName.IndexOf("\0", StringComparison.OrdinalIgnoreCase))
+                                        ? canonicalName.Substring(0, canonicalName.IndexOf('\0'))
                                         : null;
                 int[] categories = (int[])item.ExtendedProperty("System.ControlPanel.Category");
                 string[] cateStrings = new string[categories.Length];
diff --git a/src/Microsoft.PowerShell.Commands.Management/commands/management/ParsePathCommand.cs b/src/Microsoft.PowerShell.Commands.Management/commands/management/ParsePathCommand.cs
index 4a4f559bb1..46e9ba14a2 100644
--- a/src/Microsoft.PowerShell.Commands.Management/commands/management/ParsePathCommand.cs
+++ b/src/Microsoft.PowerShell.Commands.Management/commands/management/ParsePathCommand.cs
@@ -300,7 +300,7 @@ namespace Microsoft.PowerShell.Commands
                         continue;
 
                     case qualifierSet:
-                        int separatorIndex = pathsToParse[index].IndexOf(":", StringComparison.CurrentCulture);
+                        int separatorIndex = pathsToParse[index].IndexOf(':');
 
                         if (separatorIndex < 0)
                         {
@@ -449,7 +449,7 @@ namespace Microsoft.PowerShell.Commands
 
             if (SessionState.Path.IsProviderQualified(path))
             {
-                int index = path.IndexOf("::", StringComparison.CurrentCulture);
+                int index = path.IndexOf("::", StringComparison.Ordinal);
 
                 if (index != -1)
                 {
diff --git a/src/System.Management.Automation/engine/CommandCompletion/CompletionCompleters.cs b/src/System.Management.Automation/engine/CommandCompletion/CompletionCompleters.cs
index 3e862a9782..2119e51325 100644
--- a/src/System.Management.Automation/engine/CommandCompletion/CompletionCompleters.cs
+++ b/src/System.Management.Automation/engine/CommandCompletion/CompletionCompleters.cs
@@ -6600,7 +6600,7 @@ namespace System.Management.Automation
                     }
 
                     string tooltip = memberInfo.ToString();
-                    if (tooltip.IndexOf("),", StringComparison.OrdinalIgnoreCase) != -1)
+                    if (tooltip.IndexOf("),", StringComparison.Ordinal) != -1)
                     {
                         var overloads = tooltip.Split(new[] { ")," }, StringSplitOptions.RemoveEmptyEntries);
                         var newTooltip = new StringBuilder();
diff --git a/src/System.Management.Automation/engine/LanguagePrimitives.cs b/src/System.Management.Automation/engine/LanguagePrimitives.cs
index 1df4ffe1c4..75974632bf 100644
--- a/src/System.Management.Automation/engine/LanguagePrimitives.cs
+++ b/src/System.Management.Automation/engine/LanguagePrimitives.cs
@@ -1505,7 +1505,7 @@ namespace System.Management.Automation
 
         private static object NewConverterInstance(string assemblyQualifiedTypeName)
         {
-            int typeSeparator = assemblyQualifiedTypeName.IndexOf(",", StringComparison.Ordinal);
+            int typeSeparator = assemblyQualifiedTypeName.IndexOf(',');
             if (typeSeparator == -1)
             {
                 typeConversion.WriteLine("Type name \"{0}\" should be assembly qualified.", assemblyQualifiedTypeName);
diff --git a/src/System.Management.Automation/engine/Modules/ModuleCmdletBase.cs b/src/System.Management.Automation/engine/Modules/ModuleCmdletBase.cs
index 855f0ddccd..82c48e5d31 100644
--- a/src/System.Management.Automation/engine/Modules/ModuleCmdletBase.cs
+++ b/src/System.Management.Automation/engine/Modules/ModuleCmdletBase.cs
@@ -4680,7 +4680,7 @@ namespace Microsoft.PowerShell.Commands
                 filePath.StartsWith(@"../", StringComparison.Ordinal) ||
                 filePath.StartsWith(@"~/", StringComparison.Ordinal) ||
                 filePath.StartsWith(@"~\", StringComparison.Ordinal) ||
-                filePath.IndexOf(":", StringComparison.Ordinal) >= 0);
+                filePath.Contains(':'));
         }
 
         /// <summary>
diff --git a/src/System.Management.Automation/engine/ParameterSetInfo.cs b/src/System.Management.Automation/engine/ParameterSetInfo.cs
index 7f0d69e881..240a242fcd 100644
--- a/src/System.Management.Automation/engine/ParameterSetInfo.cs
+++ b/src/System.Management.Automation/engine/ParameterSetInfo.cs
@@ -292,7 +292,7 @@ namespace System.Management.Automation
                 }
 
                 // If the type is really an array, but the typename didn't include [], then add it.
-                if (type.IsArray && (parameterTypeString.IndexOf("[]", StringComparison.OrdinalIgnoreCase) == -1))
+                if (type.IsArray && (parameterTypeString.IndexOf("[]", StringComparison.Ordinal) == -1))
                 {
                     var t = type;
                     while (t.IsArray)
diff --git a/src/System.Management.Automation/engine/parser/ast.cs b/src/System.Management.Automation/engine/parser/ast.cs
index 0ba4a21cd7..434b5a6b5e 100644
--- a/src/System.Management.Automation/engine/parser/ast.cs
+++ b/src/System.Management.Automation/engine/parser/ast.cs
@@ -8349,7 +8349,7 @@ namespace System.Management.Automation.Language
         {
             if (generic == null || !generic.ContainsGenericParameters)
             {
-                if (TypeName.FullName.IndexOf("`", StringComparison.OrdinalIgnoreCase) == -1)
+                if (!TypeName.FullName.Contains('`'))
                 {
                     var newTypeName = new TypeName(Extent,
                         string.Format(CultureInfo.InvariantCulture, "{0}`{1}", TypeName.FullName, GenericArguments.Count));
@@ -8376,7 +8376,7 @@ namespace System.Management.Automation.Language
                 Type generic = TypeName.GetReflectionAttributeType();
                 if (generic == null || !generic.ContainsGenericParameters)
                 {
-                    if (TypeName.FullName.IndexOf("`", StringComparison.OrdinalIgnoreCase) == -1)
+                    if (!TypeName.FullName.Contains('`'))
                     {
                         var newTypeName = new TypeName(Extent,
                             string.Format(CultureInfo.InvariantCulture, "{0}Attribute`{1}", TypeName.FullName, GenericArguments.Count));
diff --git a/src/System.Management.Automation/engine/remoting/commands/CustomShellCommands.cs b/src/System.Management.Automation/engine/remoting/commands/CustomShellCommands.cs
index 709de06e46..76d1ef2a90 100644
--- a/src/System.Management.Automation/engine/remoting/commands/CustomShellCommands.cs
+++ b/src/System.Management.Automation/engine/remoting/commands/CustomShellCommands.cs
@@ -5436,7 +5436,7 @@ Disable-PSRemoting -force:$args[0] -queryForSet $args[1] -captionForSet $args[2]
 
             if (!string.IsNullOrEmpty(this.Username))
             {
-                if (this.Username.IndexOf("\\", StringComparison.OrdinalIgnoreCase) >= 0)
+                if (this.Username.Contains('\\'))
                 {
                     validator = null;
 
diff --git a/src/System.Management.Automation/engine/remoting/common/RunspaceConnectionInfo.cs b/src/System.Management.Automation/engine/remoting/common/RunspaceConnectionInfo.cs
index 6be6c527a4..3f19d2487f 100644
--- a/src/System.Management.Automation/engine/remoting/common/RunspaceConnectionInfo.cs
+++ b/src/System.Management.Automation/engine/remoting/common/RunspaceConnectionInfo.cs
@@ -1285,8 +1285,8 @@ namespace System.Management.Automation.Runspaces
                                                     (RemotingErrorIdStrings.RelativeUriForRunspacePathNotSupported));
             }
 
-            if (uri.OriginalString.LastIndexOf(":", StringComparison.OrdinalIgnoreCase) >
-                uri.AbsoluteUri.IndexOf("//", StringComparison.OrdinalIgnoreCase))
+            if (uri.OriginalString.LastIndexOf(':') >
+                uri.AbsoluteUri.IndexOf("//", StringComparison.Ordinal))
             {
                 UseDefaultWSManPort = false;
             }
@@ -1296,7 +1296,7 @@ namespace System.Management.Automation.Runspaces
             // http://localhost , http://127.0.0.1 etc.
             string appname;
 
-            if (uri.AbsolutePath.Equals("/", StringComparison.OrdinalIgnoreCase) &&
+            if (uri.AbsolutePath.Equals("/", StringComparison.Ordinal) &&
                 string.IsNullOrEmpty(uri.Query) && string.IsNullOrEmpty(uri.Fragment))
             {
                 appname = s_defaultAppName;
diff --git a/src/System.Management.Automation/help/SaveHelpCommand.cs b/src/System.Management.Automation/help/SaveHelpCommand.cs
index 59801e24c0..048f93ecda 100644
--- a/src/System.Management.Automation/help/SaveHelpCommand.cs
+++ b/src/System.Management.Automation/help/SaveHelpCommand.cs
@@ -192,7 +192,7 @@ namespace Microsoft.PowerShell.Commands
                         {
                             // Deal with wildcards
 
-                            int index = path.IndexOf("*", StringComparison.OrdinalIgnoreCase);
+                            int index = path.IndexOf('*');
 
                             if (index == 0)
                             {
diff --git a/src/System.Management.Automation/namespaces/FileSystemProvider.cs b/src/System.Management.Automation/namespaces/FileSystemProvider.cs
index 5e128db0e4..9705bbda7a 100644
--- a/src/System.Management.Automation/namespaces/FileSystemProvider.cs
+++ b/src/System.Management.Automation/namespaces/FileSystemProvider.cs
@@ -5337,13 +5337,13 @@ namespace Microsoft.PowerShell.Commands
         {
             string testPath = path.Replace('/', '\\');
             if (
-                (testPath.IndexOf("\\", StringComparison.OrdinalIgnoreCase) < 0) ||
-                testPath.StartsWith(".\\", StringComparison.OrdinalIgnoreCase) ||
-                testPath.StartsWith("..\\", StringComparison.OrdinalIgnoreCase) ||
-                testPath.EndsWith("\\.", StringComparison.OrdinalIgnoreCase) ||
-                testPath.EndsWith("\\..", StringComparison.OrdinalIgnoreCase) ||
-                (testPath.IndexOf("\\.\\", StringComparison.OrdinalIgnoreCase) > 0) ||
-                (testPath.IndexOf("\\..\\", StringComparison.OrdinalIgnoreCase) > 0))
+                !testPath.Contains('\\') ||
+                testPath.StartsWith(".\\", StringComparison.Ordinal) ||
+                testPath.StartsWith("..\\", StringComparison.Ordinal) ||
+                testPath.EndsWith("\\.", StringComparison.Ordinal) ||
+                testPath.EndsWith("\\..", StringComparison.Ordinal) ||
+                testPath.Contains("\\.\\", StringComparison.Ordinal) ||
+                testPath.Contains("\\..\\", StringComparison.Ordinal))
             {
                 try
                 {
diff --git a/src/System.Management.Automation/namespaces/LocationGlobber.cs b/src/System.Management.Automation/namespaces/LocationGlobber.cs
index c8ce50e355..4ed25f69b2 100644
--- a/src/System.Management.Automation/namespaces/LocationGlobber.cs
+++ b/src/System.Management.Automation/namespaces/LocationGlobber.cs
@@ -1506,7 +1506,7 @@ namespace System.Management.Automation
                     break;
                 }
 
-                int index = path.IndexOf(":", StringComparison.Ordinal);
+                int index = path.IndexOf(':');
 
                 if (index == -1)
                 {
@@ -1604,7 +1604,7 @@ namespace System.Management.Automation
                     break;
                 }
 
-                int index = path.IndexOf(":", StringComparison.Ordinal);
+                int index = path.IndexOf(':');
 
                 if (index == -1)
                 {
@@ -1863,7 +1863,7 @@ namespace System.Management.Automation
                     string normalizedRoot = _sessionState.Drive.Current.Root.Replace(
                         StringLiterals.AlternatePathSeparator, StringLiterals.DefaultPathSeparator);
 
-                    if (normalizedRoot.IndexOf(":", StringComparison.Ordinal) >= 0)
+                    if (normalizedRoot.Contains(':'))
                     {
                         string normalizedPath = path.Replace(StringLiterals.AlternatePathSeparator, StringLiterals.DefaultPathSeparator);
                         if (normalizedPath.StartsWith(normalizedRoot, StringComparison.OrdinalIgnoreCase))
@@ -3160,7 +3160,7 @@ namespace System.Management.Automation
 
             // Find the drive separator only if it's before a path separator
 
-            int index = path.IndexOf(":", StringComparison.Ordinal);
+            int index = path.IndexOf(':');
             if (index != -1)
             {
                 int separator = path.IndexOf(StringLiterals.DefaultPathSeparator, 0, index);
diff --git a/src/System.Management.Automation/namespaces/RegistryProvider.cs b/src/System.Management.Automation/namespaces/RegistryProvider.cs
index 02ef31e551..7aa18ebee6 100644
--- a/src/System.Management.Automation/namespaces/RegistryProvider.cs
+++ b/src/System.Management.Automation/namespaces/RegistryProvider.cs
@@ -2958,7 +2958,7 @@ namespace Microsoft.PowerShell.Commands
         private bool HasRelativePathTokens(string path)
         {
             return (
-                (path.IndexOf("\\", StringComparison.OrdinalIgnoreCase) == 0) ||
+                path.StartsWith('\\') ||
                 path.Contains("\\.\\") ||
                 path.Contains("\\..\\") ||
                 path.EndsWith("\\..", StringComparison.OrdinalIgnoreCase) ||
@@ -3332,12 +3332,12 @@ namespace Microsoft.PowerShell.Commands
 
                 path = NormalizePath(path);
 
-                int index = path.IndexOf("\\", StringComparison.Ordinal);
+                int index = path.IndexOf('\\');
                 if (index == 0)
                 {
                     // The user may precede a path with \
                     path = path.Substring(1);
-                    index = path.IndexOf("\\", StringComparison.Ordinal);
+                    index = path.IndexOf('\\');
                 }
 
                 if (index == -1)
@@ -3522,14 +3522,14 @@ namespace Microsoft.PowerShell.Commands
 
             do // false loop
             {
-                int index = path.IndexOf("\\", StringComparison.Ordinal);
+                int index = path.IndexOf('\\');
 
                 if (index == 0)
                 {
                     // The user may proceed a path with \
 
                     path = path.Substring(1);
-                    index = path.IndexOf("\\", StringComparison.Ordinal);
+                    index = path.IndexOf('\\');
                 }
 
                 if (index == -1)
diff --git a/src/System.Management.Automation/namespaces/TransactedRegistryKey.cs b/src/System.Management.Automation/namespaces/TransactedRegistryKey.cs
index 236fa07055..c43d709691 100644
--- a/src/System.Management.Automation/namespaces/TransactedRegistryKey.cs
+++ b/src/System.Management.Automation/namespaces/TransactedRegistryKey.cs
@@ -2037,7 +2037,7 @@ namespace Microsoft.PowerShell.Commands.Internal
                 throw new ArgumentNullException(RegistryProviderStrings.Arg_Name);
             }
 
-            int nextSlash = name.IndexOf("\\", StringComparison.OrdinalIgnoreCase);
+            int nextSlash = name.IndexOf('\\');
             int current = 0;
             while (nextSlash != -1)
             {
@@ -2045,7 +2045,7 @@ namespace Microsoft.PowerShell.Commands.Internal
                     throw new ArgumentException(RegistryProviderStrings.Arg_RegKeyStrLenBug);
 
                 current = nextSlash + 1;
-                nextSlash = name.IndexOf("\\", current, StringComparison.OrdinalIgnoreCase);
+                nextSlash = name.IndexOf('\\', current);
             }
 
             if ((name.Length - current) > MaxKeyLength)