gistfile1.txt

using System;
class Foo
{
    int _value;
    public ref int Value => ref _value;

    static void Main()
    {
        var obj = new Foo { Value = 12 };
        Console.WriteLine(obj.Value);
        obj.Value = 42;
        Console.WriteLine(obj.Value);
        Magic(ref obj.Value);
        Console.WriteLine(obj.Value);
    }
    static void Magic(ref int evil) => evil++;
}