namespace System.Threading { internal static class PlatformHelper { private const int PROCESSOR_COUNT_REFRESH_INTERVAL_MS = 30000; private static volatile int s_processorCount; private static volatile int s_lastProcessorCountRefreshTicks; internal static int ProcessorCount { get { int tickCount = Environment.TickCount; int num = s_processorCount; if (num == 0 || tickCount - s_lastProcessorCountRefreshTicks >= 30000) { num = (s_processorCount = Environment.ProcessorCount); s_lastProcessorCountRefreshTicks = tickCount; } return num; } } internal static bool IsSingleProcessor => ProcessorCount == 1; } }