update parameters (#7504)

Author: gewarren

xml/System/AppDomain.xml

@@ -2674,7 +2674,7 @@ When implementing your own class derived from <xref:System.Attribute>, you can o
         <Parameter Name="pcTInfo" Type="System.UInt32" RefType="out" Index="0" FrameworkAlternate="netframework-1.1;netframework-2.0;netframework-3.0;netframework-3.5;netframework-4.0;netframework-4.5;netframework-4.5.1;netframework-4.5.2;netframework-4.6;netframework-4.6.1;netframework-4.6.2;netframework-4.7;netframework-4.7.1;netframework-4.7.2;netframework-4.8;xamarinmac-3.0" />
       </Parameters>
       <Docs>
-        <param name="pcTInfo">Points to a location that receives the number of type information interfaces provided by the object.</param>
+        <param name="pcTInfo">When this method returns, points to a location that receives the number of type information interfaces provided by the object.</param>
         <summary>Retrieves the number of type information interfaces that an object provides (either 0 or 1).</summary>
         <remarks>
           <format type="text/markdown"><![CDATA[

xml/System/Attribute.xml

@@ -20880,8 +20880,8 @@
       </Parameters>
       <Docs>
         <param name="chars">A span containing the string representation that is encoded with base-64 digits.</param>
-        <param name="bytes">When this method returns <see langword="true" />, the converted 8-bit unsigned integers. When this method returns <see langword="false" />, either the span remains unmodified or contains an incomplete conversion of <paramref name="chars" />, up to the last valid character.</param>
-        <param name="bytesWritten">When this method returns, the number of bytes that were written in <paramref name="bytes" />.</param>
+        <param name="bytes">The span in which to write the converted 8-bit unsigned integers. If this method returns <see langword="false" />, either the span remains unmodified or contains an incomplete conversion of <paramref name="chars" />, up to the last valid character.</param>
+        <param name="bytesWritten">When this method returns, contains the number of bytes that were written in <paramref name="bytes" />.</param>
         <summary>Tries to convert the specified span containing a string representation that is encoded with base-64 digits into a span of 8-bit unsigned integers.</summary>
         <returns>
           <see langword="true" /> if the conversion was successful; otherwise, <see langword="false" />.</returns>
@@ -20923,8 +20923,8 @@
       </Parameters>
       <Docs>
         <param name="s">The string representation that is encoded with base-64 digits.</param>
-        <param name="bytes">When this method returns <see langword="true" />, the converted 8-bit unsigned integers. When this method returns <see langword="false" />, either the span remains unmodified or contains an incomplete conversion of <paramref name="s" />, up to the last valid character.</param>
-        <param name="bytesWritten">When this method returns, the number of bytes that were written in <paramref name="bytes" />.</param>
+        <param name="bytes">The span in which to write the converted 8-bit unsigned integers. When this method returns <see langword="false" />, either the span remains unmodified or contains an incomplete conversion of <paramref name="s" />, up to the last valid character.</param>
+        <param name="bytesWritten">When this method returns, contains the number of bytes that were written in <paramref name="bytes" />.</param>
         <summary>Tries to convert the specified string representation that is encoded with base-64 digits into a span of 8-bit unsigned integers.</summary>
         <returns>
           <see langword="true" /> if the conversion was successful; otherwise, <see langword="false" />.</returns>
@@ -20968,8 +20968,8 @@
       </Parameters>
       <Docs>
         <param name="bytes">A read-only span of 8-bit unsigned integers.</param>
-        <param name="chars">When this method returns <see langword="true" />, a span containing the string representation in base 64 of the elements in <paramref name="bytes" />. If the length of <paramref name="bytes" /> is 0, or when this method returns <paramref name="false" />, nothing is written into this parameter.</param>
-        <param name="charsWritten">When this method returns, the total number of characters written into <paramref name="chars" />.</param>
+        <param name="chars">The span in which to write the string representation in base 64 of the elements in <paramref name="bytes" />. If the length of <paramref name="bytes" /> is 0, or when this method returns <paramref name="false" />, nothing is written into this parameter.</param>
+        <param name="charsWritten">When this method returns, contains the total number of characters written into <paramref name="chars" />.</param>
         <param name="options">One of the enumeration values that specify whether to insert line breaks in the return value. The default value is <see cref="F:System.Base64FormattingOptions.None" />.</param>
         <summary>Tries to convert the 8-bit unsigned integers inside the specified read-only span into their equivalent string representation that is encoded with base-64 digits. You can optionally specify whether to insert line breaks in the return value.</summary>
         <returns>