In C# ? and ?? both operator is used to handle NULL values but there is some difference between them.Here will see how to use it with example.
? operator is called the Null conditional operator. this is used to handle null value of object and allow acess of members of object reference
and incase of null object reference it return null instead of Null reference exception.
Example of using the Null conditional operator
string name = employee?.Name;This code return value like employee.Name if the employee object reference is null then it return null otherwise return employee.Name
the ?? operator is called the Null Coalescing Operator it provice default value for the nullable value of type.
Example of using the null coalescing operator
int age = person?.Age ?? 0; The code assign person.Age value to age variable but if person is not null. if person is null and age variable is null or person is not null and age is null it assign default value 0 to age variable.
Thank you for reading, and I hope this blog post has helped provide you with a better understanding of Null Conditional Operator and Null Coalescing operator.