OneWay binding stops working after the target manually updated

Question

I have such WPF binding code:

TestModel source = new TestModel();
TestModel target = new TestModel();

Bind(source, target, BindingMode.OneWay);

source.Attr         


        

Answer 1

Setting target.Attribute = "foo"; cleared the binding.

MSDN:

Not only do dynamic resources and bindings operate at the same precedence as a local value, they really are a local value, but with a value that is deferred. One consequence of this is that if you have a dynamic resource or binding in place for a property value, any local value that you set subsequently replaces the dynamic binding or binding entirely. Even if you call ClearValue to clear the locally set value, the dynamic resource or binding will not be restored. In fact, if you call ClearValue on a property that has a dynamic resource or binding in place (with no "literal" local value), they are cleared by the ClearValue call too.