The LINQ Project (2)

Standard Query Operators 一覧．

OfType	Filter based on type affiliation
Select/SelectMany	Project based on transform function
Where	Filter based on predicate function
Count	Count based on optional predicate function
All/Any	Universal/Existential quantification based on predicate function
First/FirstOrDefault	Access initial member based on optional predicate function
ElementAt	Access member at specified position
Take/Skip	Access members before/after specified position
TakeWhile/SkipUntil	Access members before/after predicate function is satisfied
GroupBy	Partition based on key extraction function
ToDictionary	Create key/value dictionary based on key extraction function
OrderBy/ThenBy	Sort in ascending order based on key extraction function and optional comparison function
OrderByDescending/ ThenByDescending	Sort in descending order based on key extraction function and optional comparison function
Reverse	Reverse the order of a sequence
Fold	Aggregate value over multiple values based on aggregation function
Min/Max/Sum/Average	Numeric aggregation functions
Distinct	Filter duplicate members
Except	Filter elements that are members of specified set
Intersect	Filter elements that are not members of specified set
Union	Combine distinct members from two sets
Concat	Concatenate the values of two sequences
ToArray/ToList	Buffer results of query in array or List<T>
Range	Create a sequence of numbers in a range
Repeat	Create a sequence of multiple copies of a given value