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The Internal Representation of LINQ Query

Operators

So at this point you have been briefly introduced to the process of building query expressions using

various C# query operators (such as from, in, where, orderby, and select). When compiled, the C#

compiler actually translates these tokens into calls on various methods of the System.Linq.

Enumerable type (and possibly other types, based on your LINQ query).

As it turns out, a great many of the methods of Enumerable have been prototyped to take dele-

gates as arguments. In particular, many methods require a generic delegate of type Func<>, defined

within the System namespace of System.Core.dll. For example, consider the following members of

Enumerable that extend the IEnumerable interface: