Trace Flags 枚举
指定由 W3C 标准定义的与活动关联的标志。Specifies flags defined by the W3C standard that are associated with an activity.
此枚举有一个 FlagsAttribute 属性，允许按位组合成员值。
public enum class ActivityTraceFlags
[System.Flags] public enum ActivityTraceFlags
type ActivityTraceFlags =
Public Enum ActivityTraceFlags
尚未标记活动。The activity has not been marked.
活动（或更可能为它的父项）已标记为可用于记录。The activity (or more likely its parents) has been marked as useful to record.