Use properties.TryAdd instead of properties.Add to avoid throwing and…

… ArgumentException when "StackTrace" key was already added for Crashes

TinyInsights/ApplicationInsightsProvider.cs

@@ -225,7 +225,7 @@ public Task TrackErrorAsync(Exception ex, Dictionary<string, string>? properties
                 properties = new Dictionary<string, string>();
             }
 
-            properties.Add("StackTrace", ex.StackTrace);
+            properties.TryAdd("StackTrace", ex.StackTrace);
 
             client.TrackException(ex, properties);
             client.Flush();