Download Effective C# (Covers C# 4.0): 50 Specific Ways to Improve by Bill Wagner PDF

By Bill Wagner

I'd certainly suggest this publication for .NET or C# programmers. current C# programmers can easly see and comprehend the worth of .NET 4.0 and extra particularly the C# 4.0 language good points and instantly make the most of the recommendations to construct extra effective designs and implementations.The chapters on parallel framework, dynamic programming and question expressions are of serious significance and final result for changing into awesome programmer in C# 4.0.

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Read or Download Effective C# (Covers C# 4.0): 50 Specific Ways to Improve Your C# (2nd Edition) (Effective Software Development Series) PDF

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Additional info for Effective C# (Covers C# 4.0): 50 Specific Ways to Improve Your C# (2nd Edition) (Effective Software Development Series)

Example text

Types that implement value semantics should implement the IStructuralEquality interface. That means six different ways to express equality. Like so many of the complicated elements in C#, this one follows from the fact that C# enables you to create both value types and reference types. Two variables of a reference type are equal if they refer to the same object, referred to as object identity. Two variables of a value type are equal if they are the same type and they contain the same contents. That’s why equality tests need so many different methods.

Just return false for all failure conditions, such as null references or the wrong argument types. Now, let’s go through this method in detail so you understand why each check is there and why some checks can be left out. The first check determines whether the right-side object is null. There is no check on this reference. In C#, this is never null. The CLR throws an exception before calling any instance method through a null reference. The next check determines whether the two object references are the same, testing object identity.

Foreach loops can operate on nongeneric IEnumerable sequences and have the type coercion built into the iteration. (You should prefer the type-safe generic versions whenever possible. DoStuff( ); } uses a cast operation to perform conversions from an object to the type used in the loop. DoStuff(); } } needs to use casts to support both value types and reference types. By choosing the cast operator, the foreach statement exhibits the same behavior, no matter what the destination type is. However, because a cast is used, foreach loops can cause an InvalidCastException to be thrown.

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