How to use separate .cs files in C#?

Question

Forum; I am a newbie working out a bit of code. I would like to know the best way to use separate .cs files containing other classes and functions. As an example of a basic func

Answer 1

I find that it's best to not directly edit the .Designer.cs file, especially from a Source Control standpoint. You can use partial classes to contain you related code; in this case, you can use MainForm.Designer.cs as an example of how to accomplish partial classes (eg. partial class MainForm{}).

If you're adding event handlers through the Windows Forms Designer, it should automatically place them in MainForm.cs, not MainForm.Designer.cs. If you project grows to any significant size, I often find it useful to create multiple partial class files, one for each major group of functionality. This makes it a whole lot easier to find a particular function (and related functions).