INotifyDataErrorInfo ArgumentOutOfRangeException when raising ErrorsChanged event

Question

This is a wierd one and at this point I am thinking that it may have something to do with my machines configuration.

Basically I have created a pretty standard imple

Answer 1

I think it is binding error in TextBox template tooltip

{Binding (Validation.Errors)[0].ErrorContent}

Validation.Errors become empty but binding still has not updated its references.

I recommend to ignore the exception. Uncheck "Break when exceptions cross AppDomain or managed...." in Debugging settings.