1. Create a Assembly file using following:

        File >> New >> Project >> Class Library >> Name = MyLibCSharp

2. Add a function HelloWorld. Code will look as follows:

using System;

using System.Collections.Generic;

using System.Text;

using System.Runtime.InteropServices;

namespace MyLibCsharp

{

[Guid("FE1EB79E-3513-487e-ADFF-2B61C6CB4730")]

[ComVisible(true)]

public class Class1

{

public String HelloWorld(String name)

{

return (“Hellow World; Welcome “ + name);

}

}

}

3. Sign the Assembly (To enable it to be used by multiple Applications):

Go to Project >> MyLibCSharp Properties >> Signing >> Sign the Assembly >> New >> Key.snk

4. Enable for COM Interop:

Go to Project >> MyLibCSharp Properties >> Build >> Output >> Check the “Register for COM interop.

5. Build the Assembly.

6. Add to GAC using “Visual Studio Command Prompt” the assembly is located in DEBUG/RELEASE folder.

gacutil -I MyLibCSharp.dll

7. Execute the following:

Regasm /tlb /codebase MyLibCSharp.dll

8. ASP code:

<%

Dim foo

set foo = Server.CreateObject(”MyLibCSharp.Class1″)

Response.Write (foo.HelloWorld(“test”))

%>

9. To unregister the assembly

Regasm /unregister MyLibCSharp.dll

10. And to remove the same from GAC (Global assembly cache)

Go to

C:\WINDOWS\assembly

find the assembly you want to remove

select it , right click it and select uninstall

Bye

 

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