How to add a dyanmic tenantid property for log4net

log4net.xml

<conversionPattern value="%-5level %date [%-5.5thread] [%property{tenantid}] %-40.40logger - %message%newline" />

Log4NetTenantIdProperty.cs

using Abp.Dependency;
using Abp.Runtime.Session;

namespace Abp.Castle.Logging.Log4Net
{
    public class Log4NetTenantIdProperty
    {
        private readonly IIocResolver _iocResolver;
        private IAbpSession _session;

        public Log4NetTenantIdProperty(IIocResolver iocResolver)
        {
            _iocResolver = iocResolver;
        }

        public override string ToString()
        {
            if (_session == null)
            {
                lock (this)
                {
                    if (_session == null)
                    {
                        if (_iocResolver.IsRegistered<IAbpSession>())
                        {
                            _session = _iocResolver.Resolve<IAbpSession>();
                        }
                    }
                }
            }
            
            if (_session?.TenantId == null)
            {
                return "host";
            }

            return _session.TenantId.ToString();
        }
    }
}

Startup.cs

log4net.GlobalContext.Properties["tenantid"] = new Log4NetTenantIdProperty(IocManager.Instance);