Next major version: designed to be dotnet friendly.

Version 5 introduces major breaking changes in order to support dotnet (netstandard).
CK.ActivityMonitor has been extracted and CK.ActivityMonitor.StandardSender contains the OpenXXX and Trace/Warn... extensin methods withe the sender objects (this is to free the core API of the ActivityMonitor of these two steps Send), a new basic (and small) CK.Text with text manipulation is introduced (CK.Core depends on it).
Currently only net451 is supported.