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copied!<p>If you're on .NET 3.5 and up and using the <code>System.DirectoryServices.AccountManagement</code> (S.DS.AM) namespace, you can easily extend the existing <code>UserPrincipal</code> class to get at more advanced properties, like <code>Manager</code> etc.</p> <p>Read all about it here:</p> <ul> <li><a href="http://msdn.microsoft.com/en-us/magazine/cc135979.aspx" rel="noreferrer">Managing Directory Security Principals in the .NET Framework 3.5</a></li> <li><a href="http://msdn.microsoft.com/en-us/library/system.directoryservices.accountmanagement.aspx" rel="noreferrer">MSDN docs on System.DirectoryServices.AccountManagement</a></li> </ul> <p>Basically, you just define a derived class based on <code>UserPrincipal</code>, and then you define your additional properties you want:</p> <pre><code>[DirectoryRdnPrefix("CN")] [DirectoryObjectClass("Person")] public class UserPrincipalEx : UserPrincipal { // Inplement the constructor using the base class constructor. public UserPrincipalEx(PrincipalContext context) : base(context) { } // Implement the constructor with initialization parameters. public UserPrincipalEx(PrincipalContext context, string samAccountName, string password, bool enabled) : base(context, samAccountName, password, enabled) {} // Create the "Department" property. [DirectoryProperty("department")] public string Department { get { if (ExtensionGet("department").Length != 1) return string.Empty; return (string)ExtensionGet("department")[0]; } set { ExtensionSet("department", value); } } // Create the "Manager" property. [DirectoryProperty("manager")] public string Manager { get { if (ExtensionGet("manager").Length != 1) return string.Empty; return (string)ExtensionGet("manager")[0]; } set { ExtensionSet("manager", value); } } // Implement the overloaded search method FindByIdentity. public static new UserPrincipalEx FindByIdentity(PrincipalContext context, string identityValue) { return (UserPrincipalEx)FindByIdentityWithType(context, typeof(UserPrincipalEx), identityValue); } // Implement the overloaded search method FindByIdentity. public static new UserPrincipalEx FindByIdentity(PrincipalContext context, IdentityType identityType, string identityValue) { return (UserPrincipalEx)FindByIdentityWithType(context, typeof(UserPrincipalEx), identityType, identityValue); } } </code></pre> <p>Now, you can use the "extended" version of the <code>UserPrincipalEx</code> in your code:</p> <pre><code>using (PrincipalContext ctx = new PrincipalContext(ContextType.Domain)) { // Search the directory for the new object. UserPrincipalEx inetPerson = UserPrincipalEx.FindByIdentity(ctx, IdentityType.SamAccountName, "someuser"); // you can easily access the Manager or Department now string department = inetPerson.Department; string manager = inetPerson.Manager; } </code></pre>

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