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By Paolo Pialorsi
Get a head begin on utilizing the Microsoft Language built-in question (LINQ) venture with enhance insights from skilled builders. Data-rich functions could be tough to create as a result of great changes among question languages used to entry info and programming languages normal to jot down purposes. This sensible consultant introduces LINQ, a suite of extensions to the Microsoft visible C#(r) and Microsoft visible Basic(r) programming languages. rather than traversing various language syntaxes required for having access to facts from relational and hierarchical facts resources, builders will the right way to write queries natively in C# or visible uncomplicated. Written by way of skilled builders with robust ties to Microsoft s developer groups, this ebook introduces the LINQ structure and sessions, describes the hot language good points in either C# and visible uncomplicated, and offers code samples in either languages
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Additional info for Introducing Microsoft LINQ
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69 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 introduces enhancements to the language to better support Language Integrated Query (LINQ). 0 do not require modification of the common language runtime (CLR). 0, comparing it to the C# equivalent whenever possible. As you will see, there are some differences between these languages, and some features are not present in both. Even if you are a C# programmer, please take a look at this chapter.
The declaration of o is not valid if you enable Option Strict On. Note that even with Option Strict Off active, all variables types are those inferred by the initialization expression. 0, but all variables would be of the Object type, boxing the value assigned in the initialization expression. Note We recommend that you use Option Strict On unless you have a good reason to avoid it. For example, when you access a Component Object Model (COM) object through interop without having a primary interop assembly, the late-binding behavior of Option Strict Off could be useful to call methods implemented only through the IDispatch interface that are not exposed in the type library of the COM object.
You can only pass a pointer to some code. Repeat this to yourself a couple of times before going on. The delegate keyword for anonymous methods precedes the code block. When we have a method signature for a delegate that contains one or more parameters, this syntax allows us to define the names of the parameters for the delegate. The code in Listing 2-6 defines an anonymous method for the TwoParamsDelegate delegate type. WriteLine( "{0} {1}", text, age ); } ); } // … } We are now passing two implicit parameters to the delegate inside the Repeat10Times method.