Adds a NetworkCredential instance to the credential cache.
Assembly: System (in System.dll)
|Add(String, Int32, String, NetworkCredential)|
Adds a NetworkCredential instance for use with SMTP to the credential cache and associates it with a host computer, port, and authentication protocol. Credentials added using this method are valid for SMTP only. This method does not work for HTTP or FTP requests.
|Add(Uri, String, NetworkCredential)|
Adds a NetworkCredential instance to the credential cache for use with protocols other than SMTP and associates it with a Uniform Resource Identifier (URI) prefix and authentication protocol.