need to know about this when to use and where to use

Hi..
Im a new to asp.net C#..
I had read C# book there enum,structure,constructor, dynamic polymorphism,static polymorphism,abstract class,virtual function,array,param array,foreach,structure,function overloading,operator overloading, conditional construct..
So i need to know where it all implement in asp.net 2.0
i need with example in asp.net C#
Thank u 
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