title: How to combine forms from two different solutions together C#
body: <p>I'm new to C# and wrote two different applications using Visual Studio 2015, each with a single Form. I didn't know how to have multiple forms together in one project (should've begun that way, to my everlasting regret), but now I need that to happen. I already found instructions on how to switch between forms in a project, so could someone please help me putting them together first in one application?</p>