C#

public static MyClass Empty { get { return new MyClass(); } }

public static bool operator ==(DateRange left, DateRange right)
        {
            return (left.StartDate == right.StartDate) && (left.EndDate == right.EndDate);
        }
        public static bool operator !=(DateRange left, DateRange right)
        {
            return (left.StartDate != right.StartDate) && (left.EndDate != right.EndDate);
        }

public static bool operator !=(DateRange left, DateRange right)
{
    return !(left == right);
}

public static bool operator !=(DateRange left, DateRange right)
{
   return (left.StartDate != right.StartDate) || (left.EndDate != right.EndDate);
}

public class MySillyExample {
    public static string Empty {
        get {
            return "this is not an empty string";
        }
    }
}

public struct YourStruct
{
    public static readonly YourStruct Empty = new YourStruct();
}

Luc Pattyn wrote:

can a struct really be empty? it has a fixed size after all

Luc Pattyn wrote:

I'd call it Zero