How to find if a user is administrator or not

using System.Security.Principal;

bool IsAnAdministrator ()
{
   WindowsIdentity  identity = WindowsIdentity.GetCurrent();
   WindowsPrincipal principal = new WindowsPrincipal (identity);
   return principal.IsInRole(WindowsBuiltInRole.Administrator);
}

I am Dinesh kumar Choudhary by Name, a software Designer and Developer by Work, a Indian Hindu by Religion, Co-Founder of DSFoundation located at http://dsfoundation.wordpress.com by profession, a Loving husband and a Caring Father by Relation.

I have a blog Website at http://dennosecqtinstien.wordpress.com. DSFoundation is the Autonomous body to serve for the management of Local shops located at New Delhi, India. Now a days DSFoundation and its subsidiaries are managed by Erls Corporation, an Another initiative by me and my colleagues, in which i am the another CO-Founder of the Organization. Erls Corporation can be located at http:erlsindia.co.in