<PackageReference Include="NETStandard.Library" Version="2.0.2" />

System.Threading.ThreadState

public enum ThreadState
namespace System.Threading { public enum ThreadState { Aborted = 256, AbortRequested = 128, Background = 4, Running = 0, Stopped = 16, StopRequested = 1, Suspended = 64, SuspendRequested = 2, Unstarted = 8, WaitSleepJoin = 32 } }