C # LINQ

Sorting:

• By
• ThenBy
• OrderByDescending
• ThenByDescending
• Reverse

1  Public Ienumerable<customer> sortbyname (list<customer> cumtomerlist)2{3     return Customerlist.orderby (c = c.lastname)4         . ThenBy (c = c.firstname); 5 }

A property of that can has null value. Null value is sorted at the first.

Creating:

• Range
• Random
• Repeat

1  Publicienumerable<int>buildintegersequence ()2 {3     varintegers = Enumerable.range (0,Ten)//0,1,2,3,4,5,6,7,8,94. Select (i =5+(Ten*i));//5, ...5 6     returnintegers;7 }8 9  Publicienumerable<string>buildstringsequence ()Ten { One  A     varstrings = Enumerable.range (0,Ten) -. Select (I-= (Char)('A'+i)). ToString ());//A,b,c,d,e,f,g,h,i -  theRandom Rand =NewRandom (); -     varRandomstrings = Enumerable.range (0,Ten)     -. Select (I-= (Char)('A'+rand. Next (0, -))). ToString ()); -  +     returnstrings;  -}

Comparing/combining:

• Intersect
• Except
• Concat
• Distinct
• Union

1  Publicienumerable<int>comparesequence ()2 {3     varSEQ1 = Enumerable.range (0,Ten);4     varSEQ2 = Enumerable.range (0,Ten)5. Select (i = i*i);6 7     //return seq1. Intersect (SEQ2); //0,1,4,98     //return seq1. Except (SEQ2); //2,3,5,6,7,89     //return seq1. Concat (SEQ2); //0,1,2,3,4,5,6,7,8,9,0,1,4,9,16,25,36,49,64,81Ten     //return seq1. Concat (SEQ2). Distinct (); //Delete Duplicates One     returnSeq1. Union (SEQ2);//Also Delete Duplicates A}

C # LINQ