How to convert Console App to class Library Project?

My advice is to take current code and place into a new class file following by ensuring the code functions properly when called from Main. Next, create a class project, and the class from the console project to the new class project followed by insuring the namespaces have been updated. Next remove the class from the console project. Then in Solution Explorer, select the class project node and drag-n-drop on to the console project. This works for .NET Core, not .NET Framework which you need to add the reference under project properties. Build the solution, should fail, fix by adding using statements in program class to point to the class in the class project.