本书针对C# 2．0和3．0中添加的新特性给出了改善C#代码的50条实用建议，其中着重介绍了泛型技术，这是C# 2．0和3．O中众多新特性的基石。本书按照建议的主题进行分类，其中每个建议针对某个特定问题进行展开，分析了问题的原因，给出解决的办法。

本书适合各层次．NET开发人员阅读。

C#语言已经成为目前功能最强大的通用语言之一，近几年的几次升级更是令C#编程世界发生了极大的改变。本书是Effective C#的续作，秉承了Effective经典系列的卓越风格，用真实的代码示例，通过清晰、贴近实际和简明的阐述，以条目形式为广大程序员提供了凝聚业界经验结晶的专家建议。

本书中，著名．NET专家Bill Wagner围绕C# 2．0和3．0中的新特性给出了实用的建议，涉及泛型、多线程编程、设计实践、C#3．0语言增强、LINQ、可空类型等主题。讲述了如何在开发中使用这些新语言特性。如何避免误用所造成的影响。书中每个条目自成一体，针对使用C}}时的某个特定问题，帮助你以最佳的方式切换至C#3．0。通过阅读本书，读者完全可以举一反三，将其中许多建议应用到自己的日常编程工作中。

Chapter 1 Working with Generics

 Item 1: Use Generic Replacements of 1.x Framework API Classes

 Item 2: Define Constraints That Are Minimal and Sufficient

 Item 3: Specialize Generic Mgorithms Using Runtime Type Checking

 Item 4: Use Generics to Force Compile-Time Type Inference

 Item 5: Ensure That Your Generic Classes Support Disposable Type Parameters

 Item 6: Use Delegates to Define Method Constraints on Type Parameters

 Item 7: Do Not Create Generic Specialization on Base Classes or Interfaces

 Item 8: Prefer Generic Methods Unless Type Parameters Are Instance Fields

 Item 9: Prefer Generic Tuples to Output and Ref Parameters

 Item 10: Implement Classic Interfaces in Addition to Generic Interfaces

Chapter 2 Multithreading in fi#

 Item 11: Use the Thread Pool Instead of Creating Threads

 Item 12: Use BackgroundWorker for Cross-Thread Communication

 Item 13: Use lock() as Your First Choice for Synchronization

 Item 14: Use the Smallest Possible Scope for Lock Handles

 Item 15: Avoid Calling Unknown Code in Locked Sections

 Item 16: Understand Cross-Thread Calls in Windows Forms and WPF

Chapter 3 C# Design Practices

 Item 17: Create Composable APIs for Sequences

 Item 18: Decouple Iterations from Actions, Predicates, and Functions

 Item 19: Generate Sequence Items as Requested

 Item 20: Loosen Coupling by Using Function Parameters

 Item 21: Create Method Groups That Are Clear, Minimal, and Complete

 Item 22: Prefer Defining Methods to Overloading Operators

 Item 23: Understand How Events Increase Runtime Coupling Among Objects

 Item 24: Declare Only Nonvirtual Events

 Item 25: Use Exceptions to Report Method Contract Failures

 Item 26: Ensure That Properties Behave Like Data

 Item 27: Distinguish Between Inheritance and Composition

Chapter 4 C# 3.0 Language Enhancements

 Item 28: Augment Minimal Interface Contracts with Extension Methods

 Item 29: Enhance Constructed Types with Extension Methods

 Item 30: Prefer Implicitly Typed Local Variables

 Item 31: Limit Type Scope by Using Anonymous Types

 Item 32: Create Composable APIs for External Components

 Item 33: Avoid Modifying Bound Variables

 Item 34: Define Local Functions on Anonymous Types

 Item 35: Never Overload Extension Methods

Chapter 5 Working with LINQ

 Item 36: Understand How Query Expressions Map to Method Calls

 Item 37: Prefer Lazy Evaluation Queries

 Item 38: Prefer Lambda Expressions to Methods

 Item 39: Avoid Throwing Exceptions in Functions and Actions

 Item 40: Distinguish Early from Deferred Execution

 Item 41: Avoid Capturing Expensive Resources

 Item 42: Distinguish Between IEnumerable and IQueryable Data Sources

 Item 43: Use Single() and First() to Enforce Semantic Expectations on Queries

 Item 44: Prefer Storing Expression<> to Func<>

Chapter 6 Miscellaneous

 Item 45: Minimize the Visibility of Nullable Values

 Item 46: Give Partial Classes Partial Methods for Constructors, Mutators, and Event Handlers

 Item 47: Limit Array Parameters to Params Arrays

 Item 48: Avoid Calling Virtual Functions in Constructors

 Item 49: Consider Weak References for Large Objects

 Item 50: Prefer Implicit Properties for Mutable, Nonserializahle Data

Index