private ILogger CreateGlobalLoggerForService(string instanceName)
{
Constraint.MustNotBeNull(Configuration, "Configuration");
var logFilePath = Configuration.GetStringValue(GlobalSettings.Keys.LogFilePath);
// ReSharper disable once AssignNullToNotNullAttribute
logFilePath = string.Format(logFilePath, string.Format(".{0}", instanceName));
logFilePath = PathHelp.RootPathIfRelative(logFilePath, AppDomain.CurrentDomain.BaseDirectory);
return(Log4NetLogger.GetLogger(ExeAppSettings.FilePath,
Appenders.Trace(),
Appenders.ColouredConsole(),
Appenders.EventLog(EventLogSource),
Appenders.RollingFile(logFilePath, true)));
}