Troubles using SSH.net library for SSH and SFTP connections

I've got an application I am trying to build for the people in my life that don't want to learn how to use SSH or *nix for that matter. I am using VS2017 and I've got it designed and looking close to how I want. I am using .Text boxes to input information like IP, username, and password. I have a connect button but I'm not certain how to get the connection to create a file dialog to open for selecting files to upload, or how to get any ouput from the ssh connection.

 

I think I need to have some kind of ouput box, but I am lost as to what all I need to have.