Faster way to find out if a user exists on a system?

Question

I have an application that checks to see if a user exists (if not create it) every time it starts. This is done as follows:

bool bUserExists = false;
Directo         


        

Answer 1

This should do it (when you can't use System.DirectoryServices.AccountManagement):

static bool userExists(string sUser)
{
    using (var oUser = new DirectoryEntry("WinNT://" + Environment.MachineName + "/" + sUser + ",user")) 
    {
         return (oUser != null);
    }
}