C# - Create DLL Project

New Project

• Project Types = Visual C#
• Templates = Class Library

Project Properties

• Output Type = Class Library
• Output Path = "bin\Debug\"

 

Compile and Build => dll file will be created in output path.

Example:

1. Type the following in the Class1.cs
/**********************************/
namespace MathFunctions
{
    public class AddClass
    {
        public static int Add(int a, int b)
        {
            return (a + b);
        } 
    }
}
/**********************************/

2. After compile and build, MathFunctions.dll file is created in output bin. (MathFunctions.dll file name is based on Assembly name in Project Properties)
3. User can then use the dll by
• Add reference the MathFunctions.dll
• Using MathFunctions;
4. Then "AddClass" can now be use in the user project.

External Link
http://www.codeguru.com/csharp/csharp/cs_misc/dllsandexecutables/article.php/c4239/Creating-and-Using-C-DLLs.htm