First code review response

Maintained comment in Dispose method post-merge

Author: edwardneal

src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/TdsParserStateObjectNative.Windows.cs

@@ -232,6 +232,11 @@ internal override void Dispose()
 
             if (sessionHandle != null || packetHandle != null)
             {
+                // Comment CloseMARSSession
+                // UNDONE - if there are pending reads or writes on logical connections, we need to block
+                // here for the callbacks!!!  This only applies to async.  Should be fixed by async fixes for
+                // AD unload/exit.
+
                 packetHandle?.Dispose();
                 asyncAttnPacket?.Dispose();