WPF TextBox Binding with Formatting

Question

I have just upgraded our wpf application from 3.5sp1 to 4.0.

The code below we use to bind the textbox to the underlying view model. The textbox is editable.

Answer 1

As an update I took Jonathans suggestion and rejigged the Binding to use LostFocus instead of PropertyChanged (where appropriate - ie wherever StringFormat was also specified).

As Jonathan said, in some cases you have to trigger binding refresh / validation manually taking this approach.

If anyone has better approach, I would love to see it.