DotNet : How to solve NUnit Error - Unable to find test in assembly

The other day I wanted to learn something new so I decided to try a little Unit Testing using Microsoft .NET. After looking at different Unit Testing Frameworks I chose to use NUnit Framework. I then tried an example found on the web and after the project was built, I loaded NUnit GUI and opened unit test assembly, but to my surprise, the NUnit GUI was giving me Error message. It was telling me that the Test load failed with detailed error: SystemApplicationException: Unable to find test in the assembly.

In the end I found three different ways to make NUnit work and each one will be shown in this article.