connection counter

src/Notifications/ConnectionCounter.cs

@@ -0,0 +1,29 @@
+using System.Threading;
+
+namespace Bit.Notifications
+{
+    public class ConnectionCounter
+    {
+        private int _count = 0;
+
+        public void Increment()
+        {
+            Interlocked.Increment(ref _count);
+        }
+
+        public void Decrement()
+        {
+            Interlocked.Decrement(ref _count);
+        }
+
+        public void Reset()
+        {
+            _count = 0;
+        }
+
+        public int GetCount()
+        {
+            return _count;
+        }
+    }
+}