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
原文：https://www.cnblogs.com/Cavalry/p/9700354.html