warning MSB3391: does not contain any types that can be unregistered for COM Interop

Question

I\'ve made a simple C# DLL (that\'s part of a much larger project) using VS2005. I need to use the DLL in Excel via VBA code so I am using COM Interop on the assembly. I a

Answer 1

In the AssemblyInfo.cs file, make sure you have the following:

// Setting ComVisible to false makes the types in this assembly not visible 
// to COM components.  If you need to access a type in this assembly from 
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(true)]

UPDATE:

Read: How can I make use of .NET objects from within Excel VBA?

Which links to: http://richnewman.wordpress.com/2007/04/15/a-beginner%E2%80%99s-guide-to-calling-a-net-library-from-excel/