WPF textbox Box Tip text disappears when mouse clicks into hint text
<Textboxwidth="248"verticalcontentalignment="Center"borderthickness="0"Caretbrush=" White"><TextBox.Resources><Visualbrushx:key="Hinttext"AlignmentX=" Left"Opacity="0.5"Stretch="None"Tilemode="None"><VisualBrush.Visual><textblockfontsize=" A"Foreground=" White"Text="{DynamicResource Msguser}"/></visualbrush.visual></visualbrush></textbox.resources><textbox.style><style Targettype="TextBox"><setter property="Background"Value="Transparent"/><style.triggers><trigger property="Text"Value="{x:null}"><setter property="Background"Value="{StaticResource Hinttext}"/></trigger><trigger property="Text"Value=""><setter property="Background"Value="{StaticResource Hinttext}"/></trigger><trigger property="IsFocused"Value="true"><setter property="Background"Value="Transparent"/></trigger><!--<eventtrigger routedevent="Textbox.previewtextinput"/>--></style.triggers></style></textbox.style></textbox>
WPF textbox hint text setting