BindingOperations.ClearBinding Method (DependencyObject, DependencyProperty)
Removes the binding from a property if there is one.
Assembly: PresentationFramework (in PresentationFramework.dll)
If the given property is data-bound with a Binding, PriorityBinding, or MultiBinding, this method removes the corresponding binding expression and restores the value of the property to what it was before any local value was set through the binding.
If the given property is not data-bound, this method has no effect.
Available since 3.0