BUG: PInvoke method with System.GUID return type raises exception error (318765)

MORE INFORMATION

Steps to Reproduce the Behavior

1. In Visual Studio .NET, create a new Visual C# Console Application project named TestPInvoke.
2. Add the following code to Class1 of the Class1.cs file:

   [System.Runtime.InteropServices.DllImport("xyz.dll")]
   public static extern System.Guid returnGUID();
   public static void Main(string [] args)
   {
     System.Guid aguid = returnGUID();
   }
   					

   NOTE: The Xyz.dll file may be anything because the exception error occurs at the marshalling layer, during the validation of the PInvoke parameters before the .NET Framework calls the native method. To reproduce the problem, you do not have to add a reference, and the argument to DllImport can be any string (including an empty string) instead of an actual dynamic-link library (DLL).
   
   
3. Build and run the project. The exception appears at the following line of code:

   System.Guid aguid=returnGUID();