Operator overloading helps us to supply special/additional meaning to an operator.
C# does not allow us to overload all the operators.
Here are the guidelines.
| Operators | Overloadability |
|---|---|
| +, -, !, ~, ++, --, true, false | we can overload these unary operators. |
| +, -, *, /, %, &, |, ^, <<, >> | we can overload these binary operators. |
| ==, !=, <, >, <=, >= | the comparison operators can be overloaded If overloaded, comparison operators must be overloaded in pairs; for example, if = = is overloaded, we need to overload != also. the reverse is also true and it is similar for < and > and for <= and >=. |
| &&, || | conditional logical operators cannot be overloaded, but they are evaluated using & and |, which can be overloaded. |
| [ ] | we cannot overload the array indexing operator but we can define indexers. |
| (t)x | we cannot overload the cast operator but we can define new conversion operators (e.g., in the context of explicit and implicit) |
| +=, -=, *=, /=, %=, &=, |=, ^=, <<=, >>= | we cannot overload assignment operators but +=; for example, is evaluated using +, which can be overloaded. |
| =, ., ?:, ??, ->, =>, f(x), as, checked, unchecked, default, delegate, is, new, sizeof,typeof | we cannot overload these operators. |