System.Net.DebugThreadTracking.SetThreadKind C# (CSharp) Метод

        internal static IDisposable SetThreadKind(ThreadKinds kind)
        {
            if ((kind & ThreadKinds.SourceMask) != ThreadKinds.Unknown)
            {
                throw new InternalException();
            }

            // Ignore during shutdown.
            if (Environment.HasShutdownStarted)
            {
                return null;
            }

            ThreadKinds threadKind = CurrentThreadKind;
            ThreadKinds source = threadKind & ThreadKinds.SourceMask;

            // Special warnings when doing dangerous things on a thread.
            if ((threadKind & ThreadKinds.User) != 0 && (kind & ThreadKinds.System) != 0)
            {
                if (NetEventSource.IsEnabled) NetEventSource.Error(null, "Thread changed from User to System; user's thread shouldn't be hijacked.");
            }

            if ((threadKind & ThreadKinds.Async) != 0 && (kind & ThreadKinds.Sync) != 0)
            {
                if (NetEventSource.IsEnabled) NetEventSource.Error(null, "Thread changed from Async to Sync, may block an Async thread.");
            }
            else if ((threadKind & (ThreadKinds.Other | ThreadKinds.CompletionPort)) == 0 && (kind & ThreadKinds.Sync) != 0)
            {
                if (NetEventSource.IsEnabled) NetEventSource.Error(null, "Thread from a limited resource changed to Sync, may deadlock or bottleneck.");
            }

            ThreadKindStack.Push(
                (((kind & ThreadKinds.OwnerMask) == 0 ? threadKind : kind) & ThreadKinds.OwnerMask) |
                (((kind & ThreadKinds.SyncMask) == 0 ? threadKind : kind) & ThreadKinds.SyncMask) |
                (kind & ~(ThreadKinds.OwnerMask | ThreadKinds.SyncMask)) |
                source);

            if (CurrentThreadKind != threadKind)
            {
                if (NetEventSource.IsEnabled) NetEventSource.Info(null, $"Thread becomes:({CurrentThreadKind})");
            }

            return new ThreadKindFrame();
        }

        private void SetDateHeaderHelper(string headerName, DateTime dateTime)
        {
#if DEBUG
            using (DebugThreadTracking.SetThreadKind(ThreadKinds.User | ThreadKinds.Async)) {
#endif
            if (dateTime == DateTime.MinValue)
            {
                SetSpecialHeaders(headerName, null); // remove header
            }
            else
            {
                SetSpecialHeaders(headerName, DateToString(dateTime));
            }
#if DEBUG
        }
#endif
        }