[C#] WellKnownTypes.Timestamp does not implement IComparable

[warrenfalk]

This is a runtime exception:

IEnumerable<MyMessage> myMessages = GetSome();
var inChronologicalOrder = myMessages.OrderBy(m => m.MyTimestampField).ToArray(); // At least one object must implement IComparable

I know that dealing with time in code is wrought with perilous traps and so I'm wondering if there's a reason that it is ill-advised to make this comparable. I couldn't think of one. If you convert a Timestamp to a DateTime, UTC is specified for you, and if you try to get a Timestamp from a DateTime structure that doesn't specify itself as UTC, it fails. So therefore we don't think Timestamp should be storing anything that is non-UTC. But if we think that Timestamp is UTC, then it should be safe to compare it to other Timestamps, right?