https://docs.microsoft.com/en-us/dotnet/api/system.serviceprocess.servicebase.onstart?view=netframework-4.7.1#System_ServiceProcess_ServiceBase_OnStart_System_S...

usingCanDoo.Contracts;usingCanDoo.Core.Data;usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingSystem.Threading.Tasks;usingCanDo...