Writing your own automation using C#

C/AL provides almost everything to meet our client's requirements. Sometimes though, we may need to extend the scope of C/AL to take care of some complex requirements. In this recipe, we will see an example of how to develop a basic .NET application, and more importantly, how to use it within NAV.

How to do it...

1. Let's get started by creating a new Class Library project in Visual Studio and follow the steps.

2. Create a new file with the following code:

   using System;
   using System.Collections.Generic;
   using System.Linq;
   using System.Text;
   using System.Runtime.InteropServices;
   namespace NAVAdd
   {
     [ClassInterface(ClassInterfaceType.AutoDual)]
     [ProgId("NAVAdd")]
     [ComVisible(true)]
     public class NAVAdd
     {
       public int Add(int a, int b)
       {
         return a + b;
       }
     }
   }

3. View the properties for the project.

4. Then on the Application tab, set the Assembly name to NAVAdd.

5. After that, on the Build* tab, set the Register for COM interop property to true (checked...