This ETW trace wouldn't generate events because of the order of the methods with event id's within the class.

FailedETWTrace

using System.Diagnostics.Tracing;

namespace ETWSample
{
    /// <summary>
    /// This event would not be traced because the order of the
    /// function should be in the order of the parameters. 
    /// </summary>
    public class FailedEvent : EventSource
    {
        static public FailedEvent Trace = new FailedEvent();

        public void FailedDetailedEvent(int id, string content)
        {
            WriteEvent(2, id, content);
        }
        public void FailedTraceEvent(string content)
        {
            WriteEvent(1, content);
        }
    }
}