C# Compile & Run

Hi.

This is a very simple build plugin that allow developers to quickly experiment with the C# language without booting heavy applications such as Xamarin or Visual Studio. Originally created to be used in the classroom.

With any *.cs file open.
- `Cmd + b` Compiles filename.cs into filename.exe in the current folder and output errors
- `Shift + Cmd + b` Runs filename.exe in current folder and outputs results

This means we can write minimalistic C# console applications without overhead:
```C#
using System;
class MainClass{
  public static void Main(){
    Console.WriteLine("Hello world");
  }
}
```

Thanks in advance!