Binding Validation.HasError property in MVVM

Question

I am currently implementing a ValidationRule to check if some invalid character are in a TextBox. I am happy that setting the class I have implemented that inhe

Answer 1

all perfect work set NotifyOnValidationError="True" on binding; (or maybe with binding group also possible)

then use

sample with one textBox:

can be changed to ms sample agerangerule etc