I start by writing a simple Hello World application as shown on page 19 of the book, which in Mono looks like the following:

// project created on 9/1/2007 at 8:08 AM

using System;namespace HelloWorld

{

 class MainClass

 {

 	public static void Main(string[] args)

 	{

 		Console.WriteLine("Hello World! My first C# proggy!!");

 		Console.ReadKey ();

 	}

 }

}

A quick build attempt and the first problem comes along with an error of
A quick scout around on Google and I find that MonoDevelop assumes you're writing for .net version 1.1 and you have to change this under Project -> Options -> Runtime Options. Then set Runtime Version to 2.0.

After trying to compile it again nothing happens. A read through the build logs shows that I haven't installed gcms (some kind of mono compiler I assume??) one apt-get install mono-gcms later and everything compiles and runs as it should