Custom string class example for ApexSharp

test.cs

// compile using csc.exe test.cs
using static System.Console;

namespace Apex
{
	public class Program
	{
		static void Main()
		{
			String demoString1 = "Jay2";
			String demoString2 = "Jay1";

			String demoString3 = demoString1 + demoString2;
			System.debug(demoString3);
		}
	}

	public class System
	{
		public static void debug(string s) => WriteLine(s);
	}

	public class String
	{
		private string value { get; }
		public String(string s) => value = s;
		public static implicit operator string(String s) => s.value;
		public static implicit operator String(string s) => new String(s);
		public static String operator +(String a, String b) => new String(a.value + b.value);
	}
}