Null Semantics (LINQ to SQL)
The following table provides links to various parts of the LINQ to SQL documentation where null (Nothing in Visual Basic) issues are discussed.
Topic |
Description |
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The "Null Semantics" section of this topic includes discussion of the three-state SQL Boolean versus the two-state common language runtime (CLR) Boolean, the literal Nothing (Visual Basic) and null (C#), and other similar issues. |
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The "Null Semantics" section of this topic describes null comparison semantics in LINQ to SQL. |
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The "Differences from .NET" section of this topic describes how a return of 0 from LastIndexOf might mean either that the string is null or that the found position is 0. |
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How to: Compute the Sum of Values in a Numeric Sequence (LINQ to SQL) |
Describes how the Sum operator evaluates to null (Nothing in Visual Basic) instead of 0 for a sequence that contains only nulls or for an empty sequence. |