GasStation/FillingColumn/AddDataOfCardWindow.xaml

<Window x:Class="FillingColumn.AddDataOfCardWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:FillingColumn"
        mc:Ignorable="d"
        Title="Добавление данных карты" Height="300" Width="600">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition Height="2*"/>
        </Grid.RowDefinitions>
        <TextBlock  VerticalAlignment="Bottom" Margin="20,0,0,0">Номер карты</TextBlock>
        <TextBox x:Name="TxtCardNumber" VerticalAlignment="Bottom" MaxLength="19" Margin="120,0,50,0"></TextBox>
        <Grid Grid.Row="1">
            <Grid.RowDefinitions>
                <RowDefinition/>
                <RowDefinition/>
                <RowDefinition/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="3*"/>
                <ColumnDefinition Width="2*"/>
                <ColumnDefinition Width="2*"/>
            </Grid.ColumnDefinitions>
            <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center">Держатель карты</TextBlock>
            <TextBox Grid.Row="1" Margin="20" Name="TxtCardHolder" VerticalAlignment="Center"></TextBox>
            <TextBlock HorizontalAlignment="Center" Grid.Column="3" VerticalAlignment="Center">Платёжная система</TextBlock>
            <TextBox x:Name="TxtCardExpDate" Grid.Row="1" Grid.Column="1" VerticalAlignment="Center"></TextBox>
            <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Column="1">Дата годности</TextBlock>
            <ComboBox Grid.Row="1" Grid.Column="3" Margin="15" Name="CmbCardIssuer" SelectedIndex="0" DisplayMemberPath="NameCardIssuer"></ComboBox>
            <Button Grid.ColumnSpan="3" Grid.Row="2" Margin="150,15,150,15" Content="Добавить" Name="BtnAddCardData" Click="BtnAddCardData_Click"></Button>
        </Grid>
    </Grid>
</Window>