EventSource subclass cannot be named <our namespace>.EventSource

[carpe7]

We have been struggling to find why our logging infrastructure based on ETW and System.Diagnostics.Tracing.EventSource didn't work on .NET Framework 4.6.1 but worked on .NET Framework 4.6.2.

We have found today that, apparently, the problem was caused by our EventSource class (not the public name set in EventSourceAttribute) being just named "our namespace".EventSource.

Now we are trying to find that constraint in the documentation, with no success.

Can anyone confirm there was such an undocumented restriction in .NET Framework 4.6.1 (removed in .NET Framework 4.6.2) for EventSource subclass names?

Thank you very much.