c# timerCallback code introduction

Consider this scenario: you need to complete a certain task regularly (for example, regularly go to the remote server to fetch data, and regularly update a certain field in the database etc.), for this type of business, C# has also been encapsulated, which can help us complete it conveniently.

Code snippet:

Code description: new created a TimerCallBack class, and pass it a delegate to tell it what tasks to complete on a regular basis. New A TimerPass four parameters at the same time:

l ##Object that needs callback

l Parameters to be passed to the delegate, null means no parameters

##l How long to delay execution

l Executed every few seconds

# After

##New, execution begins.

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