In which scenarios, Func<T> to use in c#?

Well, there are several reasons why you might want to use a delegate in 'real world' programming:

1. If you want to pass a method as an argument to another method.

2. If you want a method to return another method.

3. If you want to call more than one method at once.

Bearing in mind that lambda expressions can be automatically converted to compatible delegates, #1 is particularly useful in LINQ as it allows you to write code 'inline' rather than creating separate methods.

Delegates are also the basis for events in .NET. The latter are just a special kind of delegate where the only operations allowed outside the class in which the event is defined are += and -= which  respectively add an event-handler to or remove an event-handler from the delegate's invocation list.

Here's another example which illustrates #1:

Sir,
why we use delegate Func there...we have another way to get string value from GetGreeting().
like :-

using System;


class Test
{
   static void Main()
   {
      string func = GetGreeting; // no parameters but returns a string
      Console.WriteLine(func());
      Console.ReadKey();
   }


   static string GetGreeting()
   {
      return "Hello Jitendra :)";
   }
}

Can you clear me.
thanks in advance.