Page 34 - CSharp/C#

1. Empty parameter 593
2. Lambda expression as parameter 593

3. Empty collection 593

ToDictionary 594

Aggregate 595
Defining a variable inside a Linq query (let keyword) 595

SkipWhile 596

DefaultIfEmpty 596

Usage in Left Joins: 597

SequenceEqual 598

Count and LongCount 598

Incrementally building a query 598

Zip 600

GroupJoin with outer range variable 600
ElementAt and ElementAtOrDefault 601

Linq Quantifiers 601

Joining multiple sequences 602

Joining on multiple keys 604

Select with Func selector - Use to get ranking of elements 604

TakeWhile 606

Sum 606
ToLookup 606

Build your own Linq operators for IEnumerable 607

Using SelectMany instead of nested loops 608

Any and First(OrDefault) - best practice 608

GroupBy Sum and Count 609

Reverse 610

Enumerating the Enumerable 611

OrderBy 613

OrderByDescending 614
Concat 615

Contains 615

Chapter 93: Linq to Objects 617