how to set focus on this when i log in to my application ,when log in window will open i want to type the password on this without using mouse
<PasswordBox x:Name="passwordbox" Grid.Row="1" Grid.Column="1" Margin="5,35,5,5" Width="280" Height="27" app:PasswordBoxAssistant.BindPassword="true" app:PasswordBoxAssistant.BoundPassword="{Binding TechUserModel.UserId,Mode=TwoWay,ValidatesOnDataErrors=True,UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Left" VerticalAlignment="Center">