Konstantin Spirin
Reputation: 21321
Linq to Objects: does GroupBy preserve order of elements?
Does Enumerable.GroupBy from LINQ to Objects preserve order of elements in the groups?
Upvotes: 143
Views: 18887
Answers (1)
Konstantin Spirin
Reputation: 21321
Found answer on MSDN: Yes.
The
IGrouping<TKey, TElement>objects are yielded in an order based on the order of the elements in source that produced the first key of eachIGrouping<TKey, TElement>. Elements in a grouping are yielded in the order they appear in source.
Upvotes: 202
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