design mode (C #)

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Introduced

is coupled between the sender and receiver of the request, and allows multiple objects to have the opportunity to process the request. Connect the objects into a chain and pass the request along the chain until an object handles it.

Example

There is a message entity class, and a class has an insert () method for its operation. It now requires different objects to be processed based on the character length of the inserted information, which is connected to a chain and passes the request along the chain until an object handles it.