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Overloading Equality Operators

As you may recall from Chapter 6, System.Object.Equals() can be overridden to perform value-

based (rather than referenced-based) comparisons between types. If you choose to override

Equals() (and the often related System.Object.GetHashCode() method), it is trivial to overload

the equality operators (== and !=). To illustrate, here is the updated Point type:

// This incarnation of Point also overloads the == and != operators.

public struct Point

{

...

public override bool Equals(object o)

{

return o.ToString() == this.ToString();

}

public override int GetHashCode()

{

return this.ToString().GetHashCode(); }