A frequent source of error while working with triggers is that I set the default value directly on the control itself (e.g. Label). Now when trying to change the value with a trigger that unfortunately won’t work. The default value has to be set in the control’s style as shown in the example below. <Window x:Class=”FlennyNET.Examples.DataTrigger.MainWindow” xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation” […]