C# Language
- Getting started with C# Language
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BindingList
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- Null-Coalescing Operator
- Basic usage
- Lazy properties initialization with null coalescing operator
- Null coalescing operator with method calls
- Null fall-through and chaining
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ObservableCollection
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- Yield Keyword
C# Language Null-Coalescing Operator
Syntax
- var result = possibleNullObject ?? defaultValue;
Parameters
| Parameter | Details |
|---|---|
possibleNullObject | The value to test for null value. If non null, this value is returned. Must be a nullable type. |
defaultValue | The value returned if possibleNullObject is null. Must be the same type as possibleNullObject. |
Remarks
The null coalescing operator itself is two consecutive question mark characters: ??
It is a shorthand for the conditional expression:
possibleNullObject != null ? possibleNullObject : defaultValue
The left-side operand (object being tested) must be a nullable value type or reference type, or a compile error will occur.
The ?? operator works for both reference types and value types.
Null-Coalescing Operator Related Examples
- Basic usage
- Lazy properties initialization with null coalescing operator
- Null coalescing operator with method calls
- Null fall-through and chaining
- Use existing or create new
