2016-01-14-custom-properties-in-log4net-logging_004.cs

using log4net.Core; 
using log4net.Layout.Pattern; 
using System; 
using System.Collections.Generic; 
using System.IO; 
using System.Linq; 
using System.Text;
using System.Threading.Tasks;
using System.Web; 

public class HttpContextUserPatternConverter : PatternLayoutConverter 
{ 
    protected override void Convert(TextWriter writer, LoggingEvent loggingEvent)
    { 
    string name = ""; 
    HttpContext context = HttpContext.Current;
    
    if (context != null && context.User != null && context.User.Identity.IsAuthenticated) 
    { 
        name = context.User.Identity.Name; 
    }

    writer.Write(name); 
    } 
}