Add exception type to telemetry if execution is failed (#204)

* Add exception type to telemetry if execution is failed

* Sort using

Author: dingmeng-xue

src/Common/MetricHelper.cs

@@ -24,7 +24,6 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Management.Automation.Host;
-using System.Net.Http.Headers;
 using System.Security.Cryptography;
 using System.Text;
 
@@ -285,6 +284,11 @@ private void PopulatePropertiesFromQos(AzurePSQoSEvent qos, IDictionary<string,
             eventProperties.Add("subscription-id", qos.SubscriptionId);
             eventProperties.Add("tenant-id", qos.TenantId);
 
+            if(qos.Exception != null)
+            {
+                eventProperties.Add("exception-type", qos.Exception.GetType().ToString());
+            }
+
             if (qos.InputFromPipeline != null)
             {
                 eventProperties.Add("InputFromPipeline", qos.InputFromPipeline.Value.ToString());