Passing null arguments to C# methods

Question

Is there a way to pass null arguments to C# methods (something like null arguments in c++)?

For example:

Is it possible to translate the following c++ functi

Answer 1

The OP's question is answered well already, but the title is just broad enough that I think it benefits from the following primer:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace consolePlay
{
    class Program
    {
        static void Main(string[] args)
        {
            Program.test(new DateTime());
            Program.test(null);
            //Program.test(); // <<< Error.  
            // "No overload for method 'test' takes 0 arguments"  
            // So don't mistake nullable to be optional.

            Console.WriteLine("Done.  Return to quit");
            Console.Read();
        }

        static public void test(DateTime? dteIn)
        {
            Console.WriteLine("#" + dteIn.ToString() + "#");
        }
    }
}

output:

#1/1/0001 12:00:00 AM#
##
Done.  Return to quit