Change system date/time using .NET class library

Question

Hi all, I am new to GotDotNet. I have been working with .NET framework using VB, C# and MC++ for past one year. I need to change the system date/time from one of my applications written in C#. Can anybody please tell how it can be achieved? Thanks in advance for help...! PS. I have checked that Microsoft.VisualBasic.DateString property can be used to achieve this effect but I do not want to use VB runtime.