Can I create a file that sits next to a .Designer.cs file in Visual Studio?

Question

In Visual Studio, two files are created when you create a new Windows Form in your solution (e.g. if you create MyForm.cs, MyForm.Designer.cs and MyForm.resx are also create

Answer 1

You need to edit the csproj directly. There is a DependentUpon tag that you have to add as a child tag of the file you want to place under MyForm.cs.

Example:

  MyForm.cs