We VB.netters have been having them for years, kinda boring actualy. But I guess you C# guys find them all new and exiting.

Here a small number of the blogs in the blogsphere about them.

• C# 4.0 Optional Parameters and C# 4.0 Named Parameters
• Named and optional parameters in C# 4.0
• C# 4.0 Optional Parameters

This works in VB.Net 2008 (VB9) and VB.Net 2010 (VB10).

Optional parameters have been in VB for a long time not sure when named parameters came in.

```vbnet Module Module1

Sub Main()
    Console.WriteLine(test)
    Console.WriteLine(test(b:=3))
    Console.ReadLine()
End Sub

Public Function test(Optional ByVal a As Integer = 1, Optional ByVal b As Integer = 2)
    Return a + b
End Function

End Module``` So now C# can do this too. And now they can actualy use a vb dll to its full extent.

The following only works in C# 4.0 VS 2010.

```csharp namespace ConsoleApplication1 { class Program {

    static void Main(string[] args)
    {
        Console.WriteLine(test);
        Console.WriteLine(test(b: 3));
        Console.ReadLine();
    }

    public int test(int a = 1, int b = 2)
    {
      return a + b;
    }
}

}```