Question

I read this MSDN document regarding the operator overloading.

In that example, the operators used were +, - and also can define others * or /.

I want to overload ?? operator to be used for strings like

string emptyString = emptyString ?? "OtherValue";

instead of

string emptyString = string.IsNullOrEmpty(emptyString) ? "OtherValue" : emptyString;

I don’t want to convert string to object and compare using ??.

I know that ?? is used for nullable value types, what MSDN says:

The ?? operator is called the null-coalescing operator and is used to define a default value for nullable value types or reference types.

It returns the left-hand operand if the operand is not null; otherwise it returns the right operand.

I want to ask you if is possible to overload this operator in C#. The above example is a simple situation when need to use ??.

Answer 1

No. Please take a look here Overloadable Operators C# . Section ‘These operators cannot be overloaded.’