How to use DLLExport in C# as we are using in C language

Although .NET supports the DllImport attribute for calling C functions from managed code, unfortunately there's no corresponding 'DllExport' attribute for exporting managed methods for consumption by C or C-based unmanaged languages.

This is usually achieved instead by using C++/CLI, which permits 'mixed mode' code, or COM.

However, there is a little known way of doing it using C# code which involves making a few changes to the underlying MSIL to create an export table.

Check out the article below for details of this technique:

http://www.c-sharpcorner.com/UploadFile/JTeeuwen/ExportManagedCodeasUnmanaged11262005051206AM/ExportManagedCodeasUnmanaged.aspx