Listing 2-1 extracted from chapter Assembly, module, IL language

    > Listing 2-2

This listing can be compiled with the command line:
csc.exe /out:Foo2.dll /target:library Example_2_1_to_rename_Foo2.cs
Errors: 0 Warnings: 0

namespace Foo {
   public class Bar {
      public override string ToString() {
         return "Hi from Foo2";
      }
   }
}