Monodevelop not functioning properly on raspbbery pi - 'Predefined type 'System.Object' is not defined or imported'

[AndreiArgeanu]

I want to do some C# development using my raspberry pi. I have followed the tutorial to install monodevelop on raspbian from their website, after that when I started up a simple C# console project and when trying to build that it gives me the error below. Additionally bits of code in the ide are highlighted with red and all give a similar warning of 'Predefine type 'System.something' is not defined or imported'. And I'm not sure exactly what's the issue. 

 

code

using System;

namespace ctests
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}