in sdk/src/Core/Internal/Entities/TraceHeader.cs [139:148]
public static bool TryParseAll(string rawHeader, out TraceHeader traceHeader)
{
traceHeader = FromString(rawHeader);
if(string.IsNullOrEmpty(rawHeader) || string.IsNullOrEmpty(traceHeader.RootTraceId) || string.IsNullOrEmpty(traceHeader.ParentId) || traceHeader.Sampled == SampleDecision.Unknown)
{
return false;
}
return true;
}