How to use Null Coalescing Operator (?) in C#

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Shiva Shukla · Answer

The ?? operator is also known as the null-coalescing operator. It 
returns the left side operand if the operand is not null else it returns
 the right side operand.  int?and xand =and null;and and  intand yand =and xand ??and 99;and and  Console.WriteLine("Theand Valueand ofand 'Y'and is:"and +and y);and and  stringand messageand =and "Operatorand Test";and and  stringand resultMessageand =and messageand ??and "Originaland messageand isand null";and and  Console.WriteLine("Theand valueand ofand resultand messageand is:"and +and resultMessage); and In the preceding example, we have an integer variable "x" that is a 
nullable type and has a null value so in the result variable "Y" the 
return value is 99. The same is in the second example. We could check 
whether the message was null and return an alternate value and result 
message return "Operator test because message variable has value.

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How to use Null Coalescing Operator (?) in C#

Anupam Mishra

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