C# 4.0 New Features

http://zetcode.com/lang/csharp/csharp4/
http://www.c-sharpcorner.com/uploadfile/john_charles/new-features-of-C-Sharp-4-0/
http://www.codeproject.com/Tips/460614/Difference-between-var-and-dynamic-in-Csharp
http://www.dotnet-tricks.com/Tutorial/linq/I8SY160612-IEnumerable-VS-IQueryable.html
http://www.codeproject.com/Tips/468215/Difference-Between-IEnumerable-and-IQueryable
http://www.dotnet-tricks.com/Tutorial/csharp/40ID180612-C-Sharp-Anonymous-Method.html

What is GarbageCollection and how it's work

http://www.codeproject.com/Articles/7792/Destructors-in-C
http://www.codeproject.com/Articles/637480/Csharp-and-ASP-NET-Interview-Question-and-Answers
http://www.dotnet-tricks.com/Tutorial/netframework/P1MK271013-Difference-Between-Finalize-and-Dispose-Method.html
http://www.dotnet-tricks.com/Tutorial/netframework/0L3P131012-.Net-Garbage-Collection-in-depth.html
http://msdn.microsoft.com/en-us/library/t63sy5hs.aspx
http://www.albahari.com/valuevsreftypes.aspx
http://stackoverflow.com/questions/11876503/memory-allocation-for-value-type-inside-reference-type-in-net
http://www.codeproject.com/Articles/76153/Six-important-NET-concepts-Stack-heap-value-types