Add XML remarks for 'ManagedObjectWrapper'

Author: Sergio0694

src/libraries/System.Runtime.InteropServices/src/System/Runtime/InteropServices/Marshalling/ComInterfaceOptions.cs

@@ -23,6 +23,17 @@ public enum ComInterfaceOptions
         /// <summary>
         /// Generate a wrapper for managed objects to enable exposing them through the COM interface.
         /// </summary>
+        /// <remarks>
+        /// <para>
+        /// When this flag is the only one specified on a given COM interface, no implementation methods will be generated
+        /// to support <see cref="System.Runtime.InteropServices.IDynamicInterfaceCastable"/> casts. In such a scenario,
+        /// attempting to cast to that interface type will still succeed, but any calls to interface methods will fail.
+        /// </para>
+        /// <para>
+        /// Using only this flag is purely a binary size optimization. If calling methods via this interface on native
+        /// object is required, the <see cref="ComObjectWrapper"/> flag should also be used instead.
+        /// </para>
+        /// </remarks>
         ManagedObjectWrapper = 0x1,
         /// <summary>
         /// Generate a wrapper for COM objects to enable exposing them through the managed interface.