LINQSamples | LINQ 101 Query and Lambda Expression Samples

LINQ 101

Aggregation

Aggregate, Average, Count, LongCount, Max, Min, Sum

Aggregate (simple) Aggregate (seed) Average Count LongCount Max Min Sum

Conversion

AsEnumerable, Cast, OfType, ToArray, ToDictionary, ToList, ToLookup

AsEnumerable Cast OfType ToArray ToDictionary (simple) ToDictionary (conditional) ToList ToLookup

Element

ElementAt, ElementAtOrDefault, First, FirstOrDefault, Last, LastOrDefault, Single, SingleOrDefault

ElementAt ElementAtOrDefault First (simple) First (conditional) FirstOrDefault Last LastOrDefault (simple) LastOrDefault (conditional) Single SingleOrDefault

Generation

DefaultIfEmpty, Empty, Range, Repeat

DefaultIfEmpty (simple) DefaultIfEmpty (default value) Empty Range Repeat

Grouping

GroupBy

Join

GroupJoin, Join

GroupJoin (left outer join) Join (inner join)

Ordering

OrderBy, OrderByDescending, Reverse, ThenBy, ThenByDescending

OrderBy (simple - numbers) OrderBy (simple - dates) OrderBy (simple - objects) OrderByDescending Reverse ThenBy ThenByDescending

Other

Concat, SequenceEqual, Zip

Concat (simple - numbers) Concat (simple - strings) SequenceEqual Zip

Partitioning

Skip, SkipWhile, Take, TakeWhile

Skip SkipWhile Take TakeWhile

Projection

Select, SelectMany

Select (simple) Select (anonymous type) Select (indexed) SelectMany (cross join)

Quantifiers

All, Any, Contains

All Any Contains

Restriction

Where

Where (simple - numbers) Where (simple - objects) Where (indexed)

Set

Distinct, Except, Intersect, Union

Distinct Except Intersect Union