书籍简介：

本书的作者，也是.NET专家Bill Wanger给出我们50条利用C#优点以及特性来写出健壮的，高效的，易于维护的代码的高效法则。同时，本书也反映出了C#语言愈发高级的特性以及关于它的开发社区。本书同时也给出了大量新颖的方法让你能够写出高效可靠的代码。*的第三版囊括了一些泛型和一些其他的语言集成查询（LINQ），还包括了对异常高级实践这一新的章节。

作者简介：

Bill Wagner是世界上最著名的C#开发者之一，是ECMA C#标准委员会的成员。他是Humanitarian Toolbox的主席，连续11年被授予Mcrosoft Regional Director和.NET MVP荣誉称号，最近刚刚被委派到.NET基础顾问理事会任职。

出版日期：

2018年06月

章节目录：

Chapter 1 C# Language Idioms ………………………………………………………… 1
Item 1: Prefer Implicitly Typed Local Variables ………………………………………………….. 1
Item 2: Prefer readonly to const …………………………………………………………………………. 7
Item 3: Prefer the is or as Operators to Casts ……………………………………………………… 12
Item 4: Replace string.Format() with Interpolated Strings ……………………………………. 19
Item 5: Prefer FormattableString for Culture-Specific Strings ……………………………… 23
Item 6: Avoid String-ly Typed APIs …………………………………………………………………. 26
Item 7: Express Callbacks with Delegates …………………………………………………………. 28
Item 8: Use the Null Conditional Operator for Event Invocations …………………………. 31
Item 9: Minimize Boxing and Unboxing …………………………………………………………… 34
Item 10: Use the new Modifier Only to React to Base Class Updates ……………………. 38
Chapter 2 .NET Resource Management ………………………………………….. 43
Item 11: Understand .NET Resource Management ……………………………………………… 43
Item 12: Prefer Member Initializers to Assignment Statements …………………………….. 48
Item 13: Use Proper Initialization for Static Class Members ………………………………… 51
Item 14: Minimize Duplicate Initialization Logic ……………………………………………….. 53
Item 15: Avoid Creating Unnecessary Objects …………………………………………………… 61
Item 16: Never Call Virtual Functions in Constructors ………………………………………… 65
Item 17: Implement the Standard Dispose Pattern ………………………………………………. 68
Chapter 3 Working with Generics ………………………………………………….. 77
Item 18: Always Define Constraints That Are Minimal and Sufficient ………………….. 79
Item 19: Specialize Generic Algorithms Using Runtime Type Checking ……………….. 85
Item 20: Implement Ordering Relations with IComparable＜T＞ and IComparer＜T＞ .. 92
Item 21: Always Create Generic Classes That Support Disposable Type Parameters . 98
Item 22: Support Generic Covariance and Contravariance …………………………………. 101
Item 23: Use Delegates to Define Method Constraints on Type Parameters …………. 107
Item 24: Do Not Create Generic Specialization on Base Classes or Interfaces ………. 112
Item 25: Prefer Generic Methods Unless Type Parameters Are Instance Fields ……. 116
Item 26: Implement Classic Interfaces in Addition to Generic Interfaces …………….. 120
Item 27: Augment Minimal Interface Contracts with Extension Methods ……………. 126
Item 28: Consider Enhancing Constructed Types with Extension Methods ………….. 130
Chapter 4 Working with LINQ …………………………………………………….. 133
Item 29: Prefer Iterator Methods to Returning Collections ………………. 133
Item 30: Prefer Query Syntax to Loops …………………………………………. 139
Item 31: Create Composable APIs for Sequences ……………………… 144
Item 32: Decouple Iterations from Actions, Predicates, and Functions … 151
Item 33: Generate Sequence Items as Requested …………………………. 154
Item 34: Loosen Coupling by Using Function Parameters……………….. 157
Item 35: Never Overload Extension Methods ………………………………… 163
Item 36: Understand How Query Expressions Map to Method Calls …………………… 167
Item 37: Prefer Lazy Evaluation to Eager Evaluation in Queries ………… 179
Item 38: Prefer Lambda Expressions to Methods …………………………… 184
Item 39: Avoid Throwing Exceptions in Functions and Actions …………. 188
Item 40: Distinguish Early from Deferred Execution ……………………… 191
Item 41: Avoid Capturing Expensive Resources ……………….. 195
Item 42: Distinguish between IEnumerable and IQueryable Data Sources …………… 208
Item 43: Use Single() and First() to Enforce Semantic Expectations on Queries …… 212
Item 44: Avoid Modifying Bound Variables ……………………….. 215
Chapter 5 Exception Practices ………………………………………………………. 221
Item 45: Use Exceptions to Report Method Contract Failures ………………. 221
Item 46: Utilize using and try/finally for Resource Cleanup……………….. 225
Item 47: Create Complete Application-Specific Exception Classes ……….. 232
Item 48: Prefer the Strong Exception Guarantee ……………………….. 237
Item 49: Prefer Exception Filters to catch and re-throw ……………….. 245
Item 50: Leverage Side Effects in Exception Filters ……………………….. 249
Index ……………………………………………………………………………………………. 253

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