This documentation is archived and is not being maintained.

IAuthenticationModule.CanPreAuthenticate Property

Gets a value indicating whether the authentication module supports preauthentication.

Namespace:  System.Net
Assembly:  System (in System.dll)

function get CanPreAuthenticate () : boolean

Property Value

Type: System.Boolean
true if the authorization module supports preauthentication; otherwise false.

The CanPreAuthenticate property is set to true to indicate that the authentication module can respond with a valid Authorization instance when the PreAuthenticate method is called.

Notes to Implementers:

This is typically a fixed value; either the authentication module can preauthenticate, or it cannot.

The following example shows how to use the CanPreAuthenticate property. For a complete example refer to the AuthenticationManager class.

No code example is currently available or this language may not be supported.
   String* m_authenticationType;
   bool m_canPreAuthenticate;

   // The CustomBasic constructor initializes the properties of the customized
   // authentication.
   CustomBasic() {
      m_authenticationType = S"Basic";
      m_canPreAuthenticate = false;

   // Define the authentication type. This type is then used to identify this
   // custom authentication module. The default is set to Basic.
   __property String* get_AuthenticationType() {
      return m_authenticationType;

   // Define the pre-authentication capabilities for the module. The default is set
   // to false.
   __property bool get_CanPreAuthenticate() {
      return m_canPreAuthenticate;

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0