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Generic Delegate Types : Func,Action and Predicate
C# language has observed dramatic transformation from 2.0 to 3.0 and finally with 4.0. C# 2.0 added generics , simplified delegate syntax, nullable types etc. C# 3.0 takes it a level next by adding LINQ , anonymous methods , anonymous types etc and finally C# 4.0 add dynamism, enhances parallel programming by introducing Task Parallel Library. Of all these changes , some are altogether new functionalities in language , some enhance previous features by adding additional capabilities or by just simplifying the syntactical structure. Now we have multiple ways of doing a particular task. Consider iterating through a list of objects. As a developer you can use basic foreach loop, write a LINQ query(either extension method syntax or query based format) or Parallel.ForEach(conditions applied :)) construct.