how am i supposed to do unit testing
The most popular unit testing frameworks on .Net are NUnit, xUnit and the Visual Studio Unit Testing Framework (also known as MSTest).
There is a built-in unit testing project type in Visual Studio, try new project and look in the Test section.
I'd recommend reading up on unit testing approaches. There is a lot of material out there in books and online. Key advice is to test behaviour, not methods.
how can I show that on my project report
It is common practice to set up continuous integration for software projects. Continuous integration tools like TeamCity can provide reports on unit test passes and failures through to code coverage on each build.