You receive a "TypeLoadException" error message when you use the Type Library Importer to convert a COM type library definition into a common language runtime assembly (321558)

MORE INFORMATION

Steps to reproduce the behavior

1. In a text editor such as Notepad, paste the following code in a new file, and then save the file as testlib1.idl.

   [uuid(1F6C0750-5A3B-11d2-944F-0080C7DE32C6), version(1.0)]
   library TestLib1
   {
   	importlib("stdole32.tlb");
   
   	[uuid(2160A7C9-554B-4479-8299-A8E44171BE19)]
   	dispinterface DLoveDotNetListener
   		{
   		properties:
   		methods:
   
   		[id(1)]
   		void OnFooDone
   			(
   			[in] BSTR i_Param1,
   			[in] BSTR i_Param2
   			);
   		};
   }
   

2. In the text editor, paste the following code in a new file, and then save the file as testlib2.idl.

   [uuid(2F6C0750-5A3B-11d2-944F-0080C7DE32C6), version(1.0)]
   library TestLib2
   	{
   	importlib("stdole32.tlb");
   	importlib("TestLib1.tlb");
   
   	[uuid(3160A7CA-554B-4479-8299-A8E44171BE19)]
   	coclass LoveCSharpClass
   		{
   		[default] interface IUnknown;
   		[source] dispinterface DLoveDotNetListener;
   		};
   	}
   

3. Open a Visual Studio .NET Command Prompt window. To do this, click Start, point to All Programs, point to Visual Studio .NET, point to Visual Studio .NET Tools, and then click Visual Studio .NET Command Prompt.
4. At the command prompt, type the following command to locate the directory where the test file is located, and then press ENTER:

   cd path

   Note path is a placeholder for the path of the directory where the test file is located.
5. Run the Microsoft Interface Definition Language (MIDL) compiler (Midl.exe) on the Testlib1.idl file and on the Testlib2.idl file. To do this, run the following commands at the command prompt:

   Midl testlib1.idl
   
   Midl testlib2.idl

   The testlib1.tlb file and the testlib2.tlb file are generated.
6. Run the Type Library Importer on the generated .tlb files. To do this, run the following commands at the command prompt:

   Tlbimp testlib1.tlb
   
   Tlbimp testlib2.tlb