optional parameters - C#

[lakshmi]

include the following lines of code:

using System.Runtime.InteropServices;
prefix the optional argument with [OptionalAttribute]

This takes care if an optional parameter is not supplied
by a VB script client.

-----Original Message-----
I found that optional parameters are not supported in C#.
We are currently rewriting a C++ dll in C#. The C++ dll
has methods that use optional parameters frequently.
The client is VB script that calls the methods in the
following manner.

method definition in C++
method(VARIANT v1, DATE time, [in, optional] BOOL b1,
[in,optional] short s1]

The VB Script client calls the method like this.

method(v1, time, ,50)

How do I support the above syntax from my .NET C# dll now?
I would appreaciate any help.
.