Added support for pushing content of serilog Tags property via exceptionless client

Author: dnoakes

src/Serilog.Sinks.Exceptionless/Sinks/Exceptionless/ExceptionlessClientExtensions.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Exceptionless;
 using Exceptionless.Logging;
 using Serilog.Core;
@@ -36,6 +37,24 @@ internal static string GetSource(this LogEvent log) {
             return null;
         }
 
+        internal static string[] GetTags(this LogEvent log)
+        {
+            if (log.Properties.TryGetValue("Tags", out LogEventPropertyValue value))
+            {
+                var propertyCollection = value.FlattenProperties() as List<object>;
+                if (propertyCollection == null) return Array.Empty<string>();
+
+                List<string> tags = new List<string>();
+                foreach (var item in propertyCollection)
+                {
+                    tags.Add(item.ToString());
+                }
+
+                return tags.ToArray();
+            }
+            return Array.Empty<string>();
+        }
+
         internal static LogLevel GetLevel(this LogEventLevel log)
         {
             switch (log)

src/Serilog.Sinks.Exceptionless/Sinks/Exceptionless/ExceptionlessSink.cs

@@ -108,7 +108,7 @@ public void Emit(LogEvent logEvent) {
             if (logEvent.Level.GetLevel() < minLogLevel)
                 return;
 
-            var builder = _client.CreateFromLogEvent(logEvent).AddTags(_defaultTags);
+            var builder = _client.CreateFromLogEvent(logEvent).AddTags(_defaultTags).AddTags(logEvent.GetTags());
 
             if (_includeProperties) {
                 foreach (var prop in logEvent.Properties)