Sort out the delegate concepts and the delegate concepts

Sort out the delegate concepts and the delegate concepts

I. Preface

The project size may be small. In addition to adding, deleting, modifying, and querying the project, only the business processes are left. What has not been figured out before is blurred after a long time...

II. Application scenarios

MSDN: delegate is a reference type that can be used to encapsulate naming or anonymous methods. The delegate is similar to the function pointer in C ++. However, the delegate type is safe and reliable.