Fix mismatched paramrefs (System.T*)

xml/System.Text.RegularExpressions/GroupCollection.xml

@@ -1614,7 +1614,7 @@ This member is an explicit interface member implementation. It can be used only
       <Docs>
         <param name="value">The group to locate in the group collection.</param>
         <summary>Determines the index of a specific group in the group collection.</summary>
-        <returns>The index of the <paramref name="item" /> if found; otherwise, -1.</returns>
+        <returns>The index of the <paramref name="value" /> if found; otherwise, -1.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[
 

xml/System.Text/Decoder.xml

@@ -1178,7 +1178,7 @@ The following example uses the <xref:System.Text.Encoder.Convert%2A> method to c
 
  -or-
 
- <paramref name="byteindex" /> and <paramref name="byteCount" /> do not denote a valid range in <paramref name="bytes" />.
+ <paramref name="byteIndex" /> and <paramref name="byteCount" /> do not denote a valid range in <paramref name="bytes" />.
 
  -or-
 
@@ -1276,7 +1276,7 @@ The following example uses the <xref:System.Text.Encoder.Convert%2A> method to c
 
  -or-
 
- <paramref name="byteindex" /> and <paramref name="byteCount" /> do not denote a valid range in <paramref name="bytes" />.
+ <paramref name="byteIndex" /> and <paramref name="byteCount" /> do not denote a valid range in <paramref name="bytes" />.
 
  -or-
 

xml/System.Text/Encoding.xml

@@ -2466,7 +2466,7 @@ The returned <xref:System.IO.Stream>'s <xref:System.IO.Stream.CanRead> and <xref
 
  -or-
 
- <paramref name="charIndex" /> and <paramref name="charCount" /> do not denote a valid range in <paramref name="chars" />.
+ <paramref name="charIndex" /> and <paramref name="charCount" /> do not denote a valid range in <paramref name="s" />.
 
  -or-
 
@@ -3339,7 +3339,7 @@ The returned <xref:System.IO.Stream>'s <xref:System.IO.Stream.CanRead> and <xref
 
  -or-
 
- <paramref name="byteindex" /> and <paramref name="byteCount" /> do not denote a valid range in <paramref name="bytes" />.
+ <paramref name="byteIndex" /> and <paramref name="byteCount" /> do not denote a valid range in <paramref name="bytes" />.
 
  -or-
 

xml/System.Text/EncodingProvider.xml

@@ -406,7 +406,7 @@ This method is called by the [Encoding.GetEncoding(String)](<xref:System.Text.En
           <format type="text/markdown"><![CDATA[
 
 ## Remarks
- The `encoderFallback` and `decoderFallback` parameters are objects that define the fallback strategy used in the event that an encoder cannot convert a character to a sequence of bytes or a decoder cannot convert a sequence of bytes to a character. The .NET Framework provides the following fallback mechanisms:
+ The `encoderFallback` and `decoderFallback` parameters are objects that define the fallback strategy used in the event that an encoder cannot convert a character to a sequence of bytes or a decoder cannot convert a sequence of bytes to a character. .NET provides the following fallback mechanisms:
 
 - Exception fallback. If the `encoderFallback` argument is an instance of <xref:System.Text.EncoderExceptionFallback>, or the `decoderExceptionFallback` argument is an instance of <xref:System.Text.DecoderExceptionFallback>, the encoding method throws an exception if characters cannot be encoded, and the decoding method throws an exception if a byte sequence cannot be decoded.
 
@@ -416,9 +416,6 @@ This method is called by the [Encoding.GetEncoding(String)](<xref:System.Text.En
 
  ]]></format>
         </remarks>
-        <block subset="none" type="overrides">
-          <para>Because calls to this method use your implementation of the <see cref="M:System.Text.EncodingProvider.GetEncoding(System.String)" /> method, you do not have to override it. When user code attempts to retrieve an encoding by calling the <see cref="M:System.Text.EncodingProvider.GetEncoding(System.String,System.Text.EncoderFallback,System.Text.DecoderFallback)" /> method, the method passes the <paramref name="codepage" /> identifier to every registered encoding provider until one returns a valid encoding. If none returns a valid encoding, the <see cref="M:System.Text.Encoding.GetEncoding(System.Int32)" /> method attempts to retrieve a cached encoding whose code page identifier is <paramref name="codepage" />. Because of this, if you do choose to override the <see cref="M:System.Text.EncodingProvider.GetEncoding(System.Int32,System.Text.EncoderFallback,System.Text.DecoderFallback)" /> method, your override should return <see langword="null" /> if <paramref name="codepage" /> is not the code page identifier of an encoding that you support; it should never throw an exception.</para>
-        </block>
         <block subset="none" type="usage">
           <para>This method is called by the <see cref="M:System.Text.Encoding.GetEncoding(System.String,System.Text.EncoderFallback,System.Text.DecoderFallback)" /> method. You should not call it directly from user code.</para>
         </block>