DirectoryEntry.Username
using System; using System.DirectoryServices; public class DirectoryBinding { public static int Main(string[] args) { DirectoryEntry MyDirectoryObject = new DirectoryEntry(); MyDirectoryObject.Path = "LDAP://HMSRevenge/rootDSE"; MyDirectoryObject.Username = @"Test\yourname"; MyDirectoryObject.Password = @"MyPassword"; return 0; } }