DebuggingAids: Move PerfCounterHelper out on its own

StackExchange.Redis/StackExchange/Redis/DebuggingAids.cs

 using System;
 using System.Diagnostics;
-using System.Runtime.InteropServices;
 
 namespace StackExchange.Redis
 {
-    internal static class PerfCounterHelper
-    {
-        private static readonly object staticLock = new object();
-        private static volatile PerformanceCounter _cpu;
-        private static volatile bool _disabled = !RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
-
-        public static bool TryGetSystemCPU(out float value)
-        {
-            value = -1;
-
-            try
-            {
-                if (!_disabled && _cpu == null)
-                {
-                    lock (staticLock)
-                    {
-                        if (_cpu == null)
-                        {
-                            _cpu = new PerformanceCounter("Processor", "% Processor Time", "_Total");
-
-                            // First call always returns 0, so get that out of the way.
-                            _cpu.NextValue();
-                        }
-                    }
-                }
-            }
-            catch (UnauthorizedAccessException)
-            {
-                // Some environments don't allow access to Performance Counters, so stop trying.
-                _disabled = true;
-            }
-            catch (Exception e)
-            {
-                // this shouldn't happen, but just being safe...
-                Trace.WriteLine(e);
-            }
-
-            if (!_disabled && _cpu != null)
-            {
-                value = _cpu.NextValue();
-                return true;
-            }
-            return false;
-        }
-    }
-
 #if VERBOSE
 
     partial class ConnectionMultiplexer

StackExchange.Redis/StackExchange/Redis/PerfCounterHelper.cs

+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace StackExchange.Redis
+{
+    internal static class PerfCounterHelper
+    {
+        private static readonly object staticLock = new object();
+        private static volatile PerformanceCounter _cpu;
+        private static volatile bool _disabled = !RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+
+        public static bool TryGetSystemCPU(out float value)
+        {
+            value = -1;
+
+            try
+            {
+                if (!_disabled && _cpu == null)
+                {
+                    lock (staticLock)
+                    {
+                        if (_cpu == null)
+                        {
+                            _cpu = new PerformanceCounter("Processor", "% Processor Time", "_Total");
+
+                            // First call always returns 0, so get that out of the way.
+                            _cpu.NextValue();
+                        }
+                    }
+                }
+            }
+            catch (UnauthorizedAccessException)
+            {
+                // Some environments don't allow access to Performance Counters, so stop trying.
+                _disabled = true;
+            }
+            catch (Exception e)
+            {
+                // this shouldn't happen, but just being safe...
+                Trace.WriteLine(e);
+            }
+
+            if (!_disabled && _cpu != null)
+            {
+                value = _cpu.NextValue();
+                return true;
+            }
+            return false;
+        }
+    }
+}