Popups in XBAP stop receiving anything but mouse events after losing focus?
问题 I have a Popup control in my XBAP, and whenever the popup control is open and it loses focus (such as an alert box, a breakpoint, switching to another application in Windows, switching to another Tab in my web browser, etc), the Popup no longer responds to anything but Mouse events. I cannot: Select a TextBox with the Mouse Highlight Text in a TextBox with the Mouse Use the Tab key to change controls Select a ComboBox item using the Keyboard when I open it with the Mouse I can: Change a