Build a c#.net class which implements Tunneling over SSH

I need a c# class which provides similar functionality to the program 'putty' for the purpose of using SSH to connect to a remote server and tunnelling over SSH to access a remote database. The class must make the connection internally and NOT just spawn a command line process to 'plink' or equivalent. The class should have at least three methods: 1. connectSSHTunnel(string sourceIP, string sourcePort, string destinationIP, string destinationPort, string userName, string Password, string sshPort) - Initiate SSH tunnel to remote mySQL db using supplied arguments. [login to view URL]() - Disconnects the Tunnel & Remote SSH Connection 3. dbTest(string sqlStatement) - Method to test that the SSH tunnel is working as intended. Queries the database with a select statement and returns a value to the UI.