Watermark
A pale rendered text that can be set on some controls. It disappears as soon as the users enters input.

Available for following controls:
ComboBoxDatePickerPasswordBoxTextBox
Can be set using AdonisUI.Extensions.WatermarkExtension:
<!-- xmlns:adonisExtensions="clr-namespace:AdonisUI.Extensions;assembly=AdonisUI" -->
<TextBox adonisExtensions:WatermarkExtension.Watermark="Search ..."/>