//https://redd.it/a2r64m
namespace Test
{
    public class Demo
    {
        public int Number { get; private set; }

        public Demo(int TestInt)
        {
            Number = TestInt;
        }

        public override int GetHashCode()
        {
            //For multiple properties, it's usually a good idea to XOR the Hash code of them all together
            return Number;
        }

        public override bool Equals(object obj)
        {
            return obj != null &&
                //Compare hash codes before types because it's faster
                obj.GetHashCode() == GetHashCode() &&
                //Allow comparison with raw integers too
                (obj is int || obj.GetType() == GetType());
        }

        public static bool operator ==(Demo A, Demo B)
        {
            return A.Equals(B);
        }

        public static bool operator ==(Demo A, int B)
        {
            return A.Equals(B);
        }

        public static bool operator !=(Demo A, Demo B)
        {
            return !A.Equals(B);
        }

        public static bool operator !=(Demo A, int B)
        {
            return !A.Equals(B);
        }

        //Oh boy
        public static bool operator ==(Demo A, object B)
        {
            return true;
        }

        public static bool operator !=(Demo A, object B)
        {
            return true;
        }
    }
}

//Usage example (all print "True")

//Equals
Console.Error.WriteLine((new Demo(1)).Equals(new Demo(1)));
Console.Error.WriteLine((new Demo(1)).Equals(1));
//Operator
Console.Error.WriteLine((new Demo(1)) == (new Demo(1)));
Console.Error.WriteLine((new Demo(1)) == 1);
//Schrödingers Equation
Console.Error.WriteLine((new Demo(1)) == "Cheese");
Console.Error.WriteLine((new Demo(1)) != "Chesse");