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New features of C# 3.0

, 7 Jun 2011 CPOL
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New features available in the C# 3.0

Introduction

C# 3.0 includes following some great new features.  This article is same as my original c# 3.0 new features post. Read more for c# 4.0 new features 

Implicitly typed variables (var)

C# 3.0 supports implicitly typed local variables by making use of a new keyword var. These variables are not typeless; rather, their type is inferred at compile time  

csharp-new-features-implicitly-typed-variables.JPG

Auto properties

Auto-implemented properties are another helpful new feature to save us some typing and reduce the potential to introduce bugs.

csharp-new-features-auto-properties.JPG

Object initialization

C# 3.0 introduces two new features that help when instantiating and initializing object instances. Using object and collection initializers, you can instantiate and initialize either an object or a collection in one compound statement.

  csharp-new-fatures-object-initialization.JPG

Partial Methods 

C# 2.0 introduced partial class definitions.C# 3.0 adds to that by introducing partial methods. Using partial methods, We can implement the methods in separate file (same partial class)

 csharp-new-fatures-partial-methods.JPG

 

Extension Methods 

Extension methods are one of the most exciting new features.Extension methods enable you to add methods to existing types without creating a new derived type

csharp-new-fatures-extension-methods.JPG 

 

LINQ (Language Integrated Query)

The granddaddy of all new C# 3.0 features has to be LINQ, which builds upon all of the new features, especially extension methods, lambda expressions, and anonymous types.You can use LINQ to access data from multiple sources. That means from native object collections, SQL data stores, and XML. 

csharp-new-features-linq.JPG


Related article

Please go through my post on c# 4.0 new features for more information Smile | :)

History

  • Added C# 4.0 new features reference added   - 06-June-2011
  • Posted - 04-June-2011

Conclusion   

This tutorial was created to help you understand the new features of C# 3.0. I Hope u have found this tutorial helpful and interesting. fore more c# tutorials please visit my post here

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

A Mahesh
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Symphony Services, Banglore, 560 087, India
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Comments and Discussions

 
GeneralMy vote of 1 Pinprofessionalshindepradip15-Mar-14 1:15 
General[My vote of 1] too little too late PinmemberCIDev8-Jun-11 10:08 
GeneralMy vote of 1 PinmemberMarcus Kramer8-Jun-11 8:50 
GeneralMy vote of 1 Pinmemberdarthrevenant7-Jun-11 21:26 
GeneralWhy I did not vote. PinmentorKeith Barrow7-Jun-11 10:13 
GeneralMy vote of 1 PinmemberSelvin7-Jun-11 4:37 
GeneralWhy .NET 2 PinmvpPete O'Hanlon7-Jun-11 3:42 
GeneralMy vote of 1 PinmemberNagy Vilmos6-Jun-11 2:43 
GeneralRe: My vote of 1 PinmemberA Mahesh6-Jun-11 17:39 
GeneralMy vote of 2 PinmemberAdrian Pasik6-Jun-11 0:30 
GeneralRe: My vote of 2 PinmemberA Mahesh6-Jun-11 17:35 
GeneralWAY too late with this one PinmvpDave Kreskowiak5-Jun-11 5:37 
GeneralRe: WAY too late with this one PinmemberA Mahesh6-Jun-11 17:36 
GeneralRe: WAY too late with this one PinmvpDave Kreskowiak6-Jun-11 17:51 
GeneralIn which generation are you living? PinmvpKunal_Chowdhury5-Jun-11 5:16 
GeneralRe: In which generation are you living? PinmemberMember 18388315-Jun-11 12:14 
GeneralRe: In which generation are you living? Pinmemberjim lahey6-Jun-11 1:38 
GeneralRe: In which generation are you living? PinmvpPete O'Hanlon7-Jun-11 3:38 
GeneralRe: In which generation are you living? PinmemberA Mahesh6-Jun-11 17:37 
General[My vote of 2] Really interesting idea... PinmemberKubajzz4-Jun-11 22:14 
JokeRe: [My vote of 2] Really interesting idea... PinmvpKunal_Chowdhury5-Jun-11 5:17 
GeneralRe: [My vote of 2] Really interesting idea... PinmemberMember 18388315-Jun-11 12:11 
GeneralRe: [My vote of 2] Really interesting idea... PinmvpKunal_Chowdhury5-Jun-11 13:56 
GeneralLinq Example PinmemberGeorge Swan4-Jun-11 21:27 

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