By Jay Hilyard, Stephen Teilhet

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There are also a set of partial methods that will report when a specific property is modified on this Entity Class if the partial method is implemented in another partial class definition for the Entity Class. If no other partial class definition is found, the compiler will remove those notifications. Partial methods enable the declaration of a method signature in one file of a partial class declaration and the implementation of the method in another. If the signature is found but the implementation is not, the signature is removed by the compiler.

Discussion There are a number of new keywords in this code using LINQ that were not previously used to access a message queue: var Instructs the compiler to infer the type of the variable from the right side of the statement. In essence, the type of the variable is determined by what is on the right side of the operator separating the var keyword and the expression. This allows for implicitly typed local variables. from The from keyword sets out the source collection to query against and a range variable to represent a single element from that collection.

Cs XElement is one of the main classes in LINQ to XML. It enables the loading of existing XML, creation of new XML, or retrieving of the XML text for the element via ToString. xml file that will be loaded. For more on XElement and LINQ to XML, see Chapter 15. Example 1-1. > 18 | Chapter 1: Language Integrated Query (LINQ) The two sets of data are joined using LINQ and, in particular, the join keyword.

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