Kudos to you for one-liner, but sooo hard to read.

thanks! it's approved.

C# translation!

Approved. Thx.

C# translation kumite!

System.ArgumentOutOfRangeException : 'minValue' cannot be greater than maxValue.
Parameter name: minValue

"Call a built-in" is a worthless kata idea.

I adjusted that. Also the solution was in the preloaded code with the same namespace as the tests.
So the tests were always using the preloaded solution instead of the user solution which has no namespace.

Check your sample tests. I think the initializing values for the first two tests are reversed. Once I swapped them, I was able to pass both the sample test and all the final tests. I could be wrong!

C# Translation!