disable UDC if debugger is attached to avoid dead-locks

src/AddIns/Misc/UsageDataCollector/UsageDataCollector.AddIn/AnalyticsMonitor.cs

@@ -50,6 +50,8 @@ namespace ICSharpCode.UsageDataCollector
 		
 		static void AsyncEnableDisable()
 		{
+			if (System.Diagnostics.Debugger.IsAttached)
+				return;
 			if (Enabled) {
 				Instance.OpenSession();
 			} else {
@@ -242,6 +244,8 @@ namespace ICSharpCode.UsageDataCollector
 	{
 		public override void Run()
 		{
+			if (System.Diagnostics.Debugger.IsAttached)
+				return;
 			if (AnalyticsMonitor.Enabled)
 				AnalyticsMonitor.Instance.OpenSession();
 		}