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By Ben Albahari, Joseph Albahari
When you're programming C# 4.0 and want a bit aid, this tightly targeted and functional publication tells you precisely what you want to comprehend -- with no lengthy introductions or bloated examples. It's perfect as a succinct fast reference or as a consultant to get you swiftly up to the mark when you already be aware of Java, C++, or an prior model of C#.
Written via the authors of the acclaimed C# 4.0 in a Nutshell (O’Reilly), this e-book covers the full C# 4.0 language -- with out skimping at the info -- together with:
<UL> * positive factors new to C# 4.0, resembling dynamic binding, not obligatory and named parameters, and kind parameter variance
* All of C#'s basics
* complicated issues, together with operator overloading, customized conversions, style constraints, covariance and contravariance, lambda expressions and closures, iterators, nullable forms, and operator lifting
* LINQ, beginning with sequences, lazy execution, and traditional question operators; completing with a whole connection with question expressions
* damaging code and tips, customized attributes, preprocessor directives, and XML documentation
</UL>
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Additional resources for C# 4.0 Pocket Reference
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0 Pocket Reference Download from Library of Wow! com> WARNING Adding an optional parameter to a public method that’s called from another assembly requires recompilation of both assemblies—just as though the parameter were mandatory. The default value of an optional parameter must be specified by a constant expression, or a parameterless constructor of a value type. Optional parameters cannot be marked with ref or out. Mandatory parameters must occur before optional parameters in both the method declaration and method call (the exception is with params arguments, which still always come last).
0 Pocket Reference Download from Library of Wow! com> Conditional Operators The && and || operators test for and and or conditions. They are frequently used in conjunction with the ! operator, which expresses not. windy && (rainy || sunny); } The && and || operators short-circuit evaluation when possible. In the preceding example, if it is windy, the expression (rainy || sunny) is not even evaluated. Length > 0) ... windy & (rainy | sunny); The difference is that they do not short-circuit. For this reason, they are rarely used in place of conditional operators.
Mandatory parameters must occur before optional parameters in both the method declaration and method call (the exception is with params arguments, which still always come last). WriteLine (x + ", " + y); } void Test() { Foo(1); // 1, 0 } To do the converse (pass a default value to x and an explicit value to y) you must combine optional parameters with named arguments. 0) Rather than identifying an argument by position, you can identify an argument by name. WriteLine (x + ", " + y); } void Test() { Variables and Parameters | 41 Download from Library of Wow!