NLog extension to log objects associated with a requestId

NLogExtensions.cs

public static class NLogExtensions
{
    /// <summary>
    /// Logs the item with an associated requestid
    /// </summary>
    /// <param name="logger">The logger to use</param>
    /// <param name="level">The log level to use</param>
    /// <param name="objectToLog">The object to serialize</param>
    /// <param name="message">The message to associate with the serialized object</param>        
    /// <param name="requestId">The requestid to associate with this item</param>
    /// <param name="ex">The exception to associate with the serialized object</param>
    /// <returns></returns>
    public static void SerializeToLog(this Logger logger, object objectToLog, string message, NLogLevel level = NLogLevel.Debug, string requestId = "", Exception ex = null)
    {
        //  If we're not tracking a requestId in the global diagnostics context, see if we were passed one:
        if(!GlobalDiagnosticsContext.Contains("RequestId"))
        {
            //  If we weren't passed one, create one:
            if(string.IsNullOrEmpty(requestId))
            {
                requestId = Guid.NewGuid().ToString("N");
            }

            //  Track the requestId
            //  (See http://stackoverflow.com/a/12427504/19020 for more information)
            GlobalDiagnosticsContext.Set("RequestId", requestId);
        }

        //  Format the item:
        var logItem = new
        {
            LogMessage = message,
            LogObject = objectToLog
        };

        //  Dump to string safely (and without type info):
        string formattedLogItem = string.Empty;
        using(JsConfig.With(excludeTypeInfo: true))
        {
            try
            { formattedLogItem = logItem.Dump(); }
            catch(Exception) { }
        }

        //  Log the item with the exception if we have one... otherwise just log it
        if(ex != null)
        {
            logger.Log(LogLevel.FromOrdinal((int)level), formattedLogItem, ex);
        }
        else
        {
            logger.Log(LogLevel.FromOrdinal((int)level), formattedLogItem);
        }
    }
}

/// <summary>
/// Corresponds to NLog log levels. 
/// </summary>
public enum NLogLevel
{
    Trace = 0,
    Debug = 1,
    Info = 2,
    Warn = 3,
    Error = 4,
    Fatal = 5
}