Optional Parameters in C#

C# does not have an implementation of optional parameters like those found in php, however you can simulate this feature using method overloading.

static int Add(int a, int b)

{
  return Add(a, b, 0, 0);

}

static int Add(int a, int b, int c)

{

  return Add(a, b, c, 0);

}

static int Add(int a, int b, int c, int d)

{

  return (a + b + c + d);

}