program to show; Dotnet provide cross language environment

here is the example which shows how we can achieve cross language environment in dotnet
1. First we make a dll in VB.net
2. and after that we use this VB.net's dll in c# (here we achieving cross language environment)

lets try it:
program to making dll in vb.net

//we are saving this program as SampleVBDll.vb
imports System

public class test
    public function show_data() as string
        return "hello Csharp"
    end function
end class

Complie this as:   c:\>vbc /t:library SampleVBDll.vb     (this is command to making a dll in vb.net)

and it gives us "SampleVBDll.dll" later on we use this dll as reference while compling the csharp program


//in this program we are using the VB .net dll in csharp program
//This program name is 'demo.cs'
using System;

class demo:test      //here we inherit class test in our class demo
{
    public static void Main()
    {
        test t = new test();       //here i am making the object of test class which is in 'SampleVBDll'
     
       string f = t.show_data();  //and here we are calling the function(show_data) of class 'test' which
                                           // is in 'SampleVBDll'
        Console.WriteLine(f);
    }
}

Compile this as:   c:\>csc /r:SampleVBDll.dll demo.cs 

and this give us 'demo.exe'   and output is below
OUTPUT:
hello Csharp