class Program
{
    static void Main(string[] args)
    {
        (new Program()).Method();
        Console.ReadLine();
    }

    public void Method()
    {
        int a1 = calcArea(2, 3);
        Console.WriteLine("Area with parameters is: {0}", a1);

        int a2 = calcArea();
        Console.WriteLine("Area without parameters is: {0}", a2);
    }

    private int calcArea(int l = 4, int w = 5)
    {
        return l * w;
    }
}                                

Class Program
	Private Shared Sub Main(args As String())
		(New Program()).Method()
		Console.ReadLine()
	End Sub

	Public Sub Method()
		Dim a1 As Integer = calcArea(2, 3)
		Console.WriteLine("Area with parameters is: {0}", a1)

		Dim a2 As Integer = calcArea()
		Console.WriteLine("Area without parameters is: {0}", a2)
	End Sub

	Private Function calcArea(Optional l As Integer = 4, Optional w As Integer = 5) As Integer
		Return l * w
	End Function
End Class