Null-Coalescing Operator ( ?? )

If tempFileName is not null, fileName = tempFileName, else fileName = “Untitled“।

This can now be abbreviated as follows using the Null-Coalescing Operator:

string fileName = tempFileName ?? "Untitled";

The logic is the same। If tempFileName is not null, fileName = tempFileName, else fileName = “Untitled“.

The Null-Coalescing Operator comes up a lot with nullable types, particular when converting from a nullable type to its value type:

int? count = null;

int amount = count ?? default(int);

Since count is null, amount will now be the default value of an integer type ( zero )।

These Conditional and Null-Coalescing Operators aren't the most self-describing operators :),

but I do love programming in C#!