Using the .Net 4 Framework and editing a WPF textbox bound to a nullable decimal, where formatting is specified along with the PropertyChanged UpdateSourceTrigger, the number is formatted while being edited, causing incorrect entering of numbers.Old behavoiur was that formatting was not done to the number until the field was exited, whereas the underlying property was updated as keys where pressed.Work arounds (not optimal): Do not use PropertyChanged - UpdateSourceTrigger but LostFocus instead.
Visual Studio/Silverlight/Tooling version
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