imported signalr 1.1.3 into NzbDrone.

src/Microsoft.AspNet.SignalR.Core/Infrastructure/PerformanceCounterWrapper.cs

@@ -0,0 +1,68 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.md in the project root for license information.
+
+using System;
+using System.Diagnostics;
+
+namespace Microsoft.AspNet.SignalR.Infrastructure
+{
+    internal class PerformanceCounterWrapper : IPerformanceCounter
+    {
+        private readonly PerformanceCounter _counter;
+
+        public PerformanceCounterWrapper(PerformanceCounter counter)
+        {
+            _counter = counter;
+        }
+
+        public string CounterName
+        {
+            get
+            {
+                return _counter.CounterName;
+            }
+        }
+
+        public long RawValue
+        {
+            get { return _counter.RawValue; }
+            set { _counter.RawValue = value; }
+        }
+
+        public long Decrement()
+        {
+            return _counter.Decrement();
+        }
+
+        public long Increment()
+        {
+            return _counter.Increment();
+        }
+
+        public long IncrementBy(long value)
+        {
+            return _counter.IncrementBy(value);
+        }
+
+        public void Close()
+        {
+            _counter.Close();
+        }
+
+        public void RemoveInstance()
+        {
+            try
+            {
+                _counter.RemoveInstance();
+            }
+            catch(NotImplementedException)
+            {
+            	// This happens on mono
+            }
+        }
+
+        public CounterSample NextSample()
+        {
+            return _counter.NextSample();
+        }
+    }
+}