Winform 实现跨线程以及Timer

https://docs.microsoft.com/en-us/dotnet/api/system.diagnostics.process.exited?redirectedfrom=MSDN&view=netframework-4.7.2

https://docs.microsoft.com/en-us/dotnet/api/system.timers.timer?redirectedfrom=MSDN&view=netframework-4.7.2