ToolTip versus Popup (WPF control)
popup, tooltip, wpf
Solution
A `ToolTip` is a small pop-up window that appears when a user pauses the mouse pointer over an element; the `Popup` control provides a way to display content in a separate window that floats over the current application window relative to a designated element or screen coordinate.
A `Popup` does not automatically open when the mouse pointer moves over its parent object. If you want a `Popup` to automatically open, use the `ToolTip` or `ToolTipService` class.
For more information see: ToolTip overview and Popup overview.
Problem
What are the main differences between these WPF controls? And when I should use a `ToolTip` instead of `Popup`?