How do I modify the Environment.CommandLine property?

Question

For unit tests I would like to mimic different commandline arguments. How do I modify the commandLine args to my program at runtime (looked around but can't find the trick)? Basically I am trying to find a way to modify the contents of the READONLY property Environment.CommandLine.

Answer 1

You can't, this is 'hard' read-only. It comes out of Windows, GetCommandLine API function, it doesn't allow modifying it either. You'll have to mock it.

Answer 2

It sounds to me as if you're trying to test things the hard way. Presumably somewhere you have a function that is reading directly from Environment.CommandLine. Refactor that method to take a string parameter (which in the real application will be populated from Environment.CommandLine), and test that method independently.