Call C# assembly and its method in PowerBuilder

Introduction 

Call method from C# class file/DLL in PowerBuilder 11.

Using the code 

If you use .NET target of PB 11, you can call a C# class using a .NET assembly. 

C# class DLL:

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using System;
using System.Collections.Generic; 
using System.Text; 
using System.Runtime.InteropServices; 

namespace ClassLibrary1 
{
    [ClassInterface(ClassInterfaceType.AutoDual)]
    public class Calc
    {
        public int Add(int x, int y)
        { 
            return x + y; 
        } 
        public int Sub(int x, int y)
        { 
            return x - y; 
        } 
    } 
} 

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In the .NET Windows form target, define the DLL above as a .NET assembly. Now you can call the DLL. Here is the PowerBuilder script:

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long i,j,k 
i = 5 
j = 4 
 #IF Defined PBDOTNET Then 
         ClassLibrary1.Calc l_ClassLibrary1  
     l_ClassLibrary1 = create ClassLibrary1.Calc 
          k =                 l_ClassLibrary1.Add( i,j) 
 #END IF 
 messagebox("Add( i,j)",string(k)) 
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