public static SpanContext FromString(string from)
{
if (from == string.Empty)
{
throw new Exception("Cannot convert empty string to SpanContext");
}
var parts = from.Split(':');
if (parts.Length != 4)
{
throw new Exception("String does not match tracer state format");
}
return(new SpanContext(TraceId.FromString(parts[0]), SpanId.FromString(parts[1]), SpanId.FromString(parts[2]), null, (ContextFlags)byte.Parse(parts[3])));
}