Document System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw (#3228)

* Document System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw

* typo

* suggestions by rpetrusha

Co-Authored-By: Ron Petrusha <[email protected]>

Author: carlossanlop

xml/System.Runtime.ExceptionServices/ExceptionDispatchInfo.xml

@@ -216,8 +216,8 @@
         <Parameter Name="source" Type="System.Exception" Index="0" FrameworkAlternate="netcore-2.0;netcore-2.1;netcore-2.2;netcore-3.0;netstandard-2.1" />
       </Parameters>
       <Docs>
-        <param name="source">To be added.</param>
-        <summary>To be added.</summary>
+        <param name="source">The exception whose state is captured, then rethrown.</param>
+        <summary>Throws the source exception, maintaining the original Watson information and augmenting rather than replacing the original stack trace.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>