Yes, there are several!
To get the most basic, just type the following:
That'll get you a very basic 'HelloWorld' program and will run it.
You'll soon be bored with that. The next step up is 3 three samples ASP.NET provides at . There is a 'helloworld', a basic web application and small MVC program.
The next step up from that is the 'MusicStore', which is almost a real application. 
Following those in order should give a good path to .NET on RHEL coding. Good Luck!