gistfile1.cs

using System;

namespace ConsoleApp2
{
    class Program
    {
        static void Main(string[] args)
        {
            var t = new MyType() == true;

            Foo(t);
        }

        static void Foo(bool b)
        {
            Console.WriteLine("Boolean value: " + b);
        }

        static void Foo(MyType t)
        {
            Console.WriteLine("MyType");
        }

        class MyType
        {
            public static implicit operator bool(MyType t)
            {
                return true;
            }
        }
    }
}