LicenceManager/KeyPage/KeyPageV.xaml

<Grid x:Class="KeyPageV"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:EgtWPFLib5="clr-namespace:EgtWPFLib5;assembly=EgtWPFLib5">

   <Grid.ColumnDefinitions>
      <ColumnDefinition Width="1*"/>
      <ColumnDefinition Width="1*"/>
   </Grid.ColumnDefinitions>
   <Grid.RowDefinitions>
      <RowDefinition Height="1*"/>
      <RowDefinition Height="1*"/>
      <RowDefinition Height="1*"/>
      <RowDefinition Height="1*"/>
      <RowDefinition Height="1*"/>
        <RowDefinition Height="1*"/>
    </Grid.RowDefinitions>

   <TextBlock Text="{Binding IsDongleMsg}"
              Grid.Column="0"
              Grid.Row="0"
              Style="{StaticResource ParametersTextBlock}"/>

   <ComboBox Name="IsDongleComboBox" 
             ItemsSource="{Binding IsDongleList}"
             SelectedItem="{Binding SelIsDongle}"
             IsSynchronizedWithCurrentItem="True"
             Grid.Column="1"
             Grid.Row="0"
             Style="{StaticResource ParametersComboBox}" SelectedIndex="-1"/>

   <TextBlock Text="{Binding NumberMsg}"
              Grid.Column="0"
              Grid.Row="1"
              Visibility="{Binding Number_Visibility}"
              Style="{StaticResource ParametersTextBlock}"/>

    <EgtWPFLib5:EgtTextBox Text="{Binding Number, UpdateSourceTrigger=PropertyChanged}"
                          Grid.Column="1"
                          Grid.Row="1"           
                          Visibility="{Binding Number_Visibility}"
                          Style="{StaticResource ParameterTextBox}"/>

   <TextBlock Text="{Binding LockIDMsg}"
              Grid.Column="0"
              Grid.Row="1"
              Visibility="{Binding LockID_Visibility}"
              Style="{StaticResource ParametersTextBlock}"/>

   <EgtWPFLib5:EgtTextBox Text="{Binding LockID, UpdateSourceTrigger=PropertyChanged}"
                          Grid.Column="1"
                          Grid.Row="1"
                          Visibility="{Binding LockID_Visibility}"
                          Style="{StaticResource ParameterTextBox}"/>

    <TextBlock Text="{Binding GeneratedLockIDMsg}"
              Grid.Column="0"
              Grid.Row="2"
              Visibility="{Binding GeneratedLockID_Visibility}"
              Style="{StaticResource ParametersTextBlock}"/>

    <EgtWPFLib5:EgtTextBox Text="{Binding GeneratedLockID, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
                          Grid.Column="1"
                          Grid.Row="2"
                          Visibility="{Binding GeneratedLockID_Visibility}"
                          Style="{StaticResource ParameterTextBox}"/>

    <TextBlock Text="{Binding GeneratedNumberMsg}"
              Grid.Column="0"
              Grid.Row="2"
              Visibility="{Binding GeneratedNumber_Visibility}"
              Style="{StaticResource ParametersTextBlock}"/>

    <EgtWPFLib5:EgtTextBox Text="{Binding GeneratedNumber, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
                          Grid.Column="1"
                          Grid.Row="2"
                          Visibility="{Binding GeneratedNumber_Visibility}"
                          Style="{StaticResource ParameterTextBox}"/>

    <TextBlock Text="{Binding ClientNameMsg}"
              Grid.Column="0"
              Grid.Row="3"
              Style="{StaticResource ParametersTextBlock}" />

   <ComboBox ItemsSource="{Binding ClientList}"
             SelectedItem="{Binding SelClient}"
             DisplayMemberPath="Name"
             Grid.Column="1"
             Grid.Row="3"
             Style="{StaticResource ParametersComboBox}" SelectedIndex="-1"/>

    <TextBlock Text="{Binding StateMsg}"
              Grid.Column="0"
              Grid.Row="4"
              Style="{StaticResource ParametersTextBlock}" />

    <ComboBox Name="StateComboBox" 
              ItemsSource="{Binding StateList}"
             SelectedItem="{Binding SelState}"
             Grid.Column="1"
             Grid.Row="4"
             Style="{StaticResource ParametersComboBox}" SelectedIndex="2"/>

    <TextBlock Text="{Binding KeyDateMsg}"
              Grid.Column="0"
              Grid.Row="5"
              Style="{StaticResource ParametersTextBlock}" />

    <DatePicker SelectedDate="{Binding KeyDate}"
                Height="30"
                  Width="170"
             Grid.Column="1"
             Grid.Row="5"/>

</Grid>