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What is a delegate in C#, and why is it an essential part of the language?

Expert C#
Quick Answer A delegate is a type-safe reference to a method — it stores a method and lets you call it indirectly. It enables callbacks, events, and passing behavior as a parameter. Delegates are the foundation of events, LINQ, and the entire functional-style programming model in C#.

Answer

A delegate is a type-safe reference to a method. It defines a method signature and allows methods to be stored and invoked dynamically.

Delegates enable callbacks, event-driven programming, extensibility, and loose coupling by allowing execution of unknown methods at runtime.

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