C# Type Missing

public static readonly Object Missing

using System;/*from  ww  w  .j  a  v a2s .  c om*/
using System.Reflection;
using System.CodeDom.Compiler;

class Example
{
    public static void Main()
    {
        Type t = typeof(System.String);
        BindingFlags bf = BindingFlags.Public | BindingFlags.Instance |
            BindingFlags.InvokeMethod | BindingFlags.OptionalParamBinding;

        t.InvokeMember("MyMethod", bf, null, o, new object[] {10, 55.3, 12});
        t.InvokeMember("MyMethod", bf, null, o, new object[] {10, 1.3, Type.Missing});
        t.InvokeMember("MyMethod", bf, null, o, new object[] {10, Type.Missing, Type.Missing});
    }
}