ServiceCredentials.WindowsAuthentication Property

// Create a service host.
Uri httpUri = new Uri("http://localhost/Calculator");
ServiceHost sh = new ServiceHost(typeof(Calculator), httpUri);

// Create a binding that uses a WindowsServiceCredential.
WSHttpBinding b = new WSHttpBinding(SecurityMode.Message);
b.Security.Message.ClientCredentialType = MessageCredentialType.Windows;

// Add an endpoint.
sh.AddServiceEndpoint(typeof(ICalculator), b, "WindowsCalculator");

// Get a reference to the WindowsServiceCredential object.
WindowsServiceCredential winCredential =
    sh.Credentials.WindowsAuthentication;
// Print out values.
Console.WriteLine("IncludeWindowsGroup: {0}",
    winCredential.IncludeWindowsGroups);
Console.WriteLine("UserNamePasswordValidationMode: {0}",
    winCredential.AllowAnonymousLogons);

Console.ReadLine();