https://docs.microsoft.com/en-us/visualstudio/test/isolating-code-under-test-with-microsoft-fakes?view=vs-2019#get-started-with-shims https://docs.microsoft.com

https://docs.microsoft.com/en-us/visualstudio/test/isolating-code-under-test-with-microsoft-fakes?view=vs-2019#get-started-with-shims https://docs.microsoft.com/en-us/visualstudio/test/isolating... This and other libraries can supersede method modifiers.