LINQ 101--Grouping, Set, transform, Element

First, Grouping (group)

Example 1: Grouping 0-9 numbers by 3 evenly divisible results

Code:

1 Static voidLinq1 ()2 {3     int[] numbers = {5,3,2,4,0,7,8,6,9,1 };4     varNumModBy3 = fromNinchnumbers5Group N by n%36 Into G7                         Select New{remainder = G.key, Numbers =g};8 9     foreach(varGinchnumModBy3)Ten     { OneConsole.Write ("is divisible by 3 by the remainder {0}:", G.remainder); A         foreach(varNuminchg.numbers) -         { -Console.Write ("{0}", num); the         } - Console.WriteLine (); -     } -}

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Example 2: Grouping words by first letter

Code:

1 Static voidLinq2 ()2 {3     string[] Words = {"Blueberry","Chimpanzee","Abacus","Banana","Apple","Cheese" };4     varGroupeddata = fromWinchwords5Group W by w[0]6 Into G7                              byG.key//Add Sort8                             Select New{Firstchar = G.key, Words =g};9     foreach(varGinchgroupeddata)Ten     { OneConsole.Write ("starting with the {0} letter are:", G.firstchar); A         foreach(varWordinchg.words) -         { -Console.Write ("{0}", word); the         } - Console.WriteLine (); -     } -}

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Second, set (set)

Distinct to Heavy

Source. Distinct ();

Other unions, Intersect, Except see LINQ 101 Sample

Iii. Conversion (conversion)

ToList
ToDictionary

Iv. Element (Elemental operation)

First
FirstOrDefault

LINQ 101--Grouping, Set, transform, Element