101 LINQ Samples(from MSDN)

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Restriction Operators Where - Simple 1 Where - Simple 2 Where - Simple 3 Where - Drilldown Where - Indexed Projection Operators Select - Simple 1 Select - Simple 2 Select - Transformation Select - Anonymous Types 1 Select - Anonymous Types 2 Select - Anonymous Types 3 Select - Indexed Select - Filtered SelectMany - Compound from 1 SelectMany - Compound from 2 SelectMany - Compound from 3 SelectMany - from Assignment SelectMany - Multiple from SelectMany - Indexed Partitioning Operators Take - Simple Take - Nested Skip - Simple Skip - Nested TakeWhile - Simple SkipWhile - Simple SkipWhile - Indexed Ordering Operators OrderBy - Simple 1 OrderBy - Simple 2 OrderBy - Simple 3 OrderBy - Comparer OrderByDescending - Simple 1 OrderByDescending - Simple 2 OrderByDescending - Comparer ThenBy - Simple ThenBy - Comparer ThenByDescending - Simple ThenByDescending - Comparer Reverse

Grouping Operators GroupBy - Simple 1 GroupBy - Simple 2 GroupBy - Simple 3 GroupBy - Nested GroupBy - Comparer GroupBy - Comparer, Mapped Set Operators Distinct - 1 Distinct - 2 Union - 1 Union - 2 Intersect - 1 Intersect - 2 Except - 1 Except - 2 Conversion Operators To Array To List To Dictionary OfType Element Operators First - Simple First - Indexed FirstOrDefault - Simple FirstOrDefault - Condition FirstOrDefault - Indexed ElementAt Generation Operators Range Repeat Quantifiers Any - Simple Any - Indexed Any - Grouped All - Simple All - Indexed All - Grouped

Aggregate Operators Count - Simple Count - Conditional Count - Indexed Count - Nested Count - Grouped Sum - Simple Sum - Projection Sum - Grouped Min - Simple Min - Projection Min - Grouped Min - Elements Max - Simple Max - Projection Max - Grouped Max - Elements Average - Simple Average - Projection Average - Grouped Fold - Simple Fold - Seed Miscellaneous Operators Concat - 1 Concat - 2 EqualAll - 1 EqualAll - 2 Custom Sequence Operators Combine Query Execution Deferred Immediate Query Reuse

原文链接
http://msdn2.microsoft.com/en-us/vcsharp/aa336746.aspx