Logical Pairs
It is quite common to overload the equals operator
(==) to test whether two objects are equal
(however equality might be defined for your object). C# insists that
if you overload the equals operator, you must also overload the
not-equals operator (!=). Similarly, the less-than
(<) and greater-than (>)
operators must be paired, as must the less-than or equals
(<=) and greater-than or equals
(>=) operators.
Tip
C
and
C++
programmers
take
note: Many C++
libraries require the implementation of only the
< operator or the =
operator, and other operations are derived from these. C# requires
the implementation of both halves of these paired operators.
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