C# Coding Standard

Rule: 7@521

Synopsis:	Override the `Equals` method whenever you implement the `==` operator, and make them do the same thing
Language:	C#
Severity Level:	1
Category:	Object oriented

Description:

This allows infrastructure code such as Hashtable and ArrayList, which use the Equals method, to behave the same way as user code written using the equality operator.

Note:

For value types, the other way around applies also, i.e., whenever you override the Equals method, then also implement the equality operator.

Literature References:

MS Design Guidelines for Implementing Equals and the Equality Operator (==)