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What are the new features included in C#4.0 version?

Posted By :Gowthammanju     Posted Date :July 31, 2011    Points :40   Category :C# 
C# 4.0 has released recently in 2010 and all these features could work with visual studio 2010 because VS2010 can be targeted to .net framework 4.0 version. C# 4.0 mainly focused on dynamic programming and contains following features.
Dynamic Binding
Name and optional Arguments
Improvements in CoVarience and ContraVarience
COM specific interop features

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Could remember some of the new features included in C#3.0 Version?

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