May 11th, 2007
Understanding C#: ?? Operator
The ?? operator returns the left-hand operand if it is not null, or else it returns the right operand.
int? i = null; int count = i ?? 0;
The value that count is set to is 0. The ?? operator is short hand for:
int? i = null; int count = i.HasValue ? i.Value : 0;
Or
int? i = null; int count = 0; if (i.HasValue) count = i.Value;
The Understanding C# series at Coder Journal will be an on going project to help the readers to better understand the C# programming language that doesn’t get covered except at the more advanced levels.
Tags: .Net, Framework 2.0
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