Just a few small changes to my NLog sample logging to Azure Application Insights.

I modified the application so I could provide the InstrumentationKey via the command line or the ApplicationInsights.Config file.(I have a minimalist config for this sample)

namespace devMobile.Azure.ApplicationInsightsNLogClient
{
   class Program
   {
      private static Logger log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.ToString());

      static void Main(string[] args)
      {
         if ((args.Length != 0) && (args.Length != 1))
         {
            Console.WriteLine("Usage ApplicationInsightsNLogClient");
            Console.WriteLine("      ApplicationInsightsNLogClient <instrumentationKey>");
            return;
         }

         if (args.Length == 1)
         {
            TelemetryConfiguration.Active.InstrumentationKey = args[0];
         }

         log.Trace("This is an nLog Trace message");
         log.Debug("This is an nLog Debug message");
         log.Info("This is an nLog Info message");
         log.Warn("This is an nLog Warning message");
         log.Error("This is an nLog Error message");
         log.Fatal("This is an nLog Fatal message");

         TelemetryConfiguration.Active.TelemetryChannel.Flush();

			Console.WriteLine("Press <enter> to exit>");
			Console.ReadLine();
		}
	}
}

Code for my sample console application is here.

Another of my clients has an application which uses NLog and sooner or later they are going to want to move their logging to Azure Application Insights.

The application consists of a number of Azure websites and some embedded clients. The Azure applications log information to the local file system on each box but the number of boxes is growing so finding and tracing issues is becoming painful.

//---------------------------------------------------------------------------------
// Copyright (c) 2018, devMobile Software
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//---------------------------------------------------------------------------------
using System;
using Microsoft.ApplicationInsights.Extensibility;
using NLog;

namespace devMobile.Azure.ApplicationInsightsNLogClient
{
   class Program
   {
      private static Logger log = LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.ToString());

      static void Main(string[] args)
      {
         if (args.Length != 1)
         {
            Console.WriteLine("Command line argument InstrumentationKey missing");
            return;
         }
         TelemetryConfiguration.Active.InstrumentationKey = args[0];

         log.Trace("This is nLog");
         log.Debug("This is a Debug message");
         log.Info("This is a Info message");
         log.Warn("This is a Warning message");
         log.Error("This is an Error message");
         log.Fatal("This is a Fatal message");

         new Microsoft.ApplicationInsights.TelemetryClient().Flush();
      }
   }
}

Sample code ApplicationInsightsNLogClient

Two clients to go, one which uses serilog the other has a DIY system which I’m ignoring as long as possible.