C# allows programmers to overload all of the operators.
Equality ( == ) operator can be overloaded as follows:
public static bool operator ==(T item1, T Item2)
{
return item1.SomeProperty == item2.SomeProperty && item1.AnotherProperty == item2.AnotherProperty;
}
public static bool operator !=(T item1, T item2)
{
return !(item1==item2);
}
public static bool operator <(T item1, T item2)
{
return item1.SomeProperty < item2.SomeProperty;
}
etc.
Operators that can be Overloaded:
+, -, *, /, %, &, |, <<, >> All C# binary operators can be overloaded.
+, -, !, ~, ++, –, true, false All C# unary operators can be overloaded.
==, !=, <, >, <= , >= All relational operators can be overloaded,
but only as pairs.
&&, || They can’t be overloaded
() (Conversion operator) They can’t be overloaded
+=, -=, *=, /=, %= These compound assignment operators can be
overloaded. But in C#, these operators are
automatically overloaded when the respective
binary operator is overloaded.
=, . , ?:, ->, new, is, as, size of These operators can’t be overloaded
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