Download PDF by Bill Wagner: Effective C#: 50 Specific Ways to Improve Your C#

By Bill Wagner

"This ebook quite demonstrates Bill's strengths as a author and programmer. In a truly brief period of time, he's in a position to current a subject, repair it and finish it; each one bankruptcy is tight, succinct, and to the point." –Josh Holmes, self sustaining Contractor "The publication presents a great creation to the C# language components from a pragmatic standpoint, picking most sensible practices alongside the best way, and following a transparent and logical development from the fundamental syntax to making parts to bettering your code writing talents. due to the fact that every one subject is roofed in brief entries, it's very effortless to learn and you may quick notice the advantages of the book." –Tomas Restrepo, Microsoft MVP "The ebook covers the fundamentals good, specially with admire to the choices wanted whilst deriving periods from System.Object. you'll be able to learn with examples which are transparent, concise and stable. i feel it's going to carry low cost to so much readers." –Rob metal, critical sector Integration COE & Lead Architect, Microsoft "Effective C# offers the C# developer with the instruments they should speedily develop their event in visible C# 2003 whereas additionally delivering perception into the various advancements to the language that might be hitting a laptop close to you within the type of visible C# 2005." –Doug Holland, Precision items "Part of the purpose of the .NET Framework–and the C# Language, in particular–is to allow the developer concentration fixing client difficulties and carry product, instead of spending hours (or even weeks) writing plumbing code. invoice Wagner's potent C#, not just indicates you what is occurring behind the curtain, yet indicates you ways to use specific C# code constructs. Written in a dispassionate kind that makes a speciality of the facts–and simply the facts–of writing powerful C# code, Wagner's ebook drills down into practices that might allow you to write C# purposes and parts which are more straightforward to keep up in addition to quicker to run. i am recommending potent C# to all scholars of my .NET BootCamp and different C#-related courses." –Richard Hale Shaw, www.RichardHaleShawGroup.com C#'s resemblances to C++, Java, and C assist you to examine, yet there is a draw back: C# programmers frequently proceed to exploit older recommendations whilst much better possible choices can be found. In powerful C#, revered .NET professional invoice Wagner identifies fifty methods you can begin leveraging the total energy of C# so as to write quicker, extra effective, and extra trustworthy software program. powerful C# follows the layout that made powerful C++ (Addison-Wesley, 1998) and powerful Java (Addison-Wesley, 2001) crucial to thousands of builders: transparent, sensible reasons, professional assistance, and lots of practical code examples. Drawing on his unsurpassed C# adventure, Wagner addresses every little thing from worth kinds to assemblies, exceptions to mirrored image. alongside the best way, he exhibits precisely easy methods to keep away from dozens of universal C# functionality and reliability pitfalls. you will how you can: Use either varieties of C# constants for potency and maintainability, see merchandise 2 Use immutable information forms to dispose of pointless blunders checking, see merchandise 7 steer clear of the C# functionality that'll virtually constantly get you in hassle, see merchandise 10 reduce rubbish assortment, boxing, and unboxing, see goods sixteen and 17 Take complete benefit of interfaces and delegates, see goods 19 even though 22 Create CLS compliant assemblies that use noncompliant C# language beneficial properties, see merchandise 30 enhance reliability and maintainability by way of developing small, cohesive assemblies, see merchandise 32 Leverage the whole energy of .NET's runtime diagnostics, see merchandise 36 be aware of when–and whilst not–to use mirrored image, see goods forty two and forty three Preview the foremost improvements in C# 2.0, see merchandise forty nine you are already a winning C# programmer–this booklet might actually help turn into a good one. invoice Wagner is co-founder of and .NET advisor for SRT recommendations. A nationally well-known self reliant professional on .NET, he has been a typical contributor to ASP.NET professional journal, visible Studio journal, and the .NET perception e-newsletter. as well as being a Microsoft local Director, he's additionally energetic within the Southeast Michigan .NET person crew and the Ann Arbor Computing Society. he's writer of The C# middle Language Little Black publication (The Coriolis crew, 2002). © Copyright Pearson schooling. All rights reserved.

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A little more work when you write the class pays off every time you or someone else uses it. ToString(). Every type you create should override ToString() to provide the most common textual representation of the type. ToString() returns "Customer". That is never useful to anyone. Even if ToString() will be used only for debugging purposes, it should be more sophisticated than that. ToString() should return the textual representation most likely to be used by clients of that class. In the Customer example, that's the name: public override string ToString() { return _name; } If you don't follow any of the other recommendations in this item, follow that exercise for all the types you define.

If you mean to write a function that works with all objects that are instances of MyType, that's fine. If you mean to write a function that works only with MyType objects exactly, you should use the exact type for comparison. Here, you would do that inside the foreach loop. The most common time when the exact runtime type is important is when doing equality tests (see Item 9). isinst comparisons provided by as and is are semantically correct. Good object-oriented practice says that you should avoid converting types, but sometimes there are no alternatives.

Object, which has no conversion operators, none is eligible for this test. A collection of SecondType objects cannot be used in the previous UseCollection() function because the conversion fails, as you already saw. The foreach statement (which uses a cast) does not examine the casts that are available in the runtime type of the objects in the collection. Object class (the type returned by IEnumerator. Current) and the declared type of the loop variable (in this case, MyType). Finally, sometimes you want to know the exact type of an object, not just whether the current type can be converted to a target type.

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