Paul Kimmel's LINQ Unleashed: for C# PDF


By Paul Kimmel

Microsoft's hugely expected LINQ question know-how makes it effortless to retrieve any details programmatically from any information resource, regardless of the place it comes from or how it truly is saved. utilizing LINQ, builders can question gadgets, relational databases, XML files, and ADO.NET datasets - and do all of it without delay from C# 3.0, leveraging the strong services of LINQ. it is a definitive advisor to getting real-world effects with LINQ, utilizing C# 3.0 and visible Studio 2008. In LINQ Unleashed, Microsoft MVP Paul Kimmel covers each side of LINQ programming, displaying how LINQ might help dramatically enhance your productiveness and construct extra trustworthy, maintainable functions.

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Info Testing Anonymous Type Equality 23 Testing Anonymous Type Equality NOTE It is possible to use reflection to get type information about anonymous types, and you might want to do this, occasionally, for anonymous types returned from methods. However, the actual name of the anonymous type can vary between compilations, so devising a way to use the class name probably has no reliable uses. If you want to test member equality, use the Equals method (defined by all objects). Anonymous types with the same order, type, and name, type, and value of member declarators also produce the same hash; the hash is the basis for the equality test.

Getting the StackFrame can be a great way to create a utility that tracks function calls during debugging—like writing the StackTrace to the Debug window in a way that is useful to you—and reflection has many uses. Reflection can be useful for dynamically loaded assemblies, as demonstrated by NUnit and Visual Studio’s unit testing. Summary This chapter examined anonymous types in detail. Anonymous types are strong types where the compiler does the work of figuring out the actual type and writing the class implementation, if the anonymous type is a composite type.

1 Reflector’s disassembler clearly shows that the collection initialization code is converted by the compiler into the verbose form of construction and a call to Add. You can combine object initialization and LINQ queries and implement the ColoredPointList. 6) inherits from List and uses a query and a conversion operator to convert the typed list of ColoredPoint objects to an array of PointF objects. 2) are composed of. 2 The Hypergraph toy with one of the rendered images. The GetPoints method uses a LINQ query that selects all of the Point objects from all of the ColoredPoints.

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