https://repl.it/@kameko/SwitchMadness

main.cs

using System;

class MainClass 
{
	public static void Main (string[] args) 
	{
		var p = new Program();
		p.Run();
	}
}

public class Program
{
	// Who needs silly old methods when you have switch blocks?
	
	public void Run()
	{
		dynamic arg1 = null;
		dynamic arg2 = null;
		dynamic arg3 = null;
		dynamic arg4 = null;
		dynamic arg5 = null;
		dynamic arg6 = null;
		dynamic arg7 = null;
		dynamic arg8 = null;
		dynamic arg9 = null;
		
		const String ENTRY = "ENTRY";
		const String PRINT = "PRINT";
		const String ADD = "ADD";
		const String END = "END";
		
		String lastCall = ENTRY;
		START:
		switch (lastCall)
		{
			case ENTRY:
			{
				if (lastCall == ENTRY) { arg1 = 5; arg2 = 7; lastCall = PRINT; goto case ADD; }
				if (lastCall == PRINT) { lastCall = END; goto case PRINT; }
				if (lastCall == END) goto END;
				break;
			}
			case PRINT:
			{
				Console.WriteLine(arg1);
				goto case ENTRY;
			}
			case ADD:
			{
				arg1 = arg1 + arg2;
				goto case ENTRY;
			}
		}
		goto START;
		END:
		return;
	}
}