WPF: Showing Tooltip on hovering over disabled element.

To show the tooltip while hovering over disabled element, use the ShowOnDisabled attached property of the ToolTipService class! From XAML.

To show the tooltip while hovering over disabled element, use the ShowOnDisabled attached property of the ToolTipService class! From XAML.
Syntax:

<Button ToolTipService.ShowOnDisabled="True">
</Button>

Or from C# code, you can call the static method corresponding to the attached property:
ToolTipService.SetShowOnDisabled(myButton, true);

Note: If you want to close the tooltip that is currently showing then,
Set its IsOpen property to false.