Is it possible to use a DLL created using C# in an unmanaged VC++ application?

Question

I have a DLL that I wrote in C# and I want to use it both with C# applications and applications written in unmanaged VC++. Is this possible?

Answer 1

To supplement other answers here, here's the MS support article which describes your scenario.

http://support.microsoft.com/kb/828736

Answer 2

Well, seems I have to bring up my unmanaged exports again. ;-)

Just answered a similar question 2 days ago. This totally works in C#, and it even creates a .lib & .exp file for your C# assembly to be consumed by C++:

internal class Sample
{
  [DllExport("_export_test", CallingConvention.Cdecl)]
  static int Test(int a)
  {
     return a + 1;
  }
}