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c#vmwarenlog

NLog - System.MethodAccessException only in VMWare Horizon View client

I updated my C# WPF application to use latest versions of NLog and NLog.Extensions.Logging.

It works everywhere except in this VMWare Horizons client where it crashes with this error:

    $exception  {"Attempt by method 'NLog.Extensions.Logging.NLogLoggerProvider..ctor(NLog.Extensions.Logging.NLogProviderOptions, NLog.LogFactory)' to access method 'NLog.LogManager.get_LogFactory()' failed."}  System.MethodAccessException

This project is currently using NLog v4.5.11 and NLog.Extensions.Logging v1.4

A previous version of my application which uses NLog v.4.4.12 and NLog.Extensions.Logging v1.0 worked in this VM so i am trying to fall back to that. Then i'll work my way up the versions of these libraries.

More to follow soon... meanwhile, any insight into what might be causing this would be very welcome.

using Microsoft.Extensions.Logging;
using NLog.Extensions.Logging;
using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            var loggerFactory = new LoggerFactory();
            var Logger = loggerFactory.CreateLogger<Program>();

            loggerFactory.AddNLog();


            Logger.LogDebug($"============{Environment.NewLine}");

            Console.ReadLine();

        }
    }
}
Solution

  • You have a problem with your deployment. Your application is not using NLog ver. 4.5 (But some older version).

    LogFactory-property became public with this: https://github.com/NLog/NLog/pull/2316

    Maybe you have old NLog registered in Windows GAC ? (Global Assembly Cache)

    Maybe try writing the typeof(NLog.LogFactory).Assembly-location using Console.WriteLine.