overriding Equals in c#

Programmer Question

I am trying to override Equals so that it compares based on a variable ID:

public class OrderID

{
    public string ID { get; private set; }

    public OrderID(string id)
    {
        ID = id;
    }


    public override bool Equals(object obj)
    {
        if (obj is OrderID)
        {
            return ((OrderID)obj).ID == ID;
        }
        else return false;
    }

    public override string ToString()
    {
        return ID;
    }
}

However when I test this in the following manner it returns false:

static void Main(string[] args)

    {

        OrderID i1 = new OrderID("Hello");
        OrderID i2 = new OrderID("Hello");

        bool test = i1 == i2;

        Console.WriteLine(test.ToString());

        Console.ReadKey();
    }

What is the problem? When i try to step through it my override is not even stepped into.

Find the answer here