'Declaration
<EventMetricValueAttribute("totalDuration", SummaryFunction.Average, "ms", Caption="Total Request Duration", Description="The entire time spent processing the request, excluding time to return the response", IsDefaultValue=True)> <JsonIgnoreAttribute()> Public ReadOnly Property Duration As TimeSpan
[EventMetricValue("totalDuration", SummaryFunction.Average, "ms", Caption="Total Request Duration", Description="The entire time spent processing the request, excluding time to return the response", IsDefaultValue=true)] [JsonIgnore()] public TimeSpan Duration {get;}