Parameters

challenge

The challenge returned by the Internet resource.

request

The System.Net.WebRequest that initiated the authentication challenge.

credentials

The System.Net.ICredentials associated with this request.

Returns

An instance of the System.Net.Authorization class containing the result of the authorization attempt. If there is no authentication module to respond to the challenge, this method returns null.

Exceptions

Type	Reason
ArgumentNullException	challenge , request , or credentials is null.

Remarks

The AuthenticationManager.Authenticate(string, WebRequest, ICredentials) method calls the IAuthenticationModule.Authenticate(string, WebRequest, ICredentials) method on each registered authentication module until one of the module responds with an System.Net.Authorization instance.

The first System.Net.Authorization instance returned is used to authenticate the request. If no authentication module can authenticate the request, the AuthenticationManager.Authenticate(string, WebRequest, ICredentials) method returns null.

Authentication modules are called in the order in which they are registered with the System.Net.AuthenticationManager.

Requirements