zxc/SSS/Izmen.xaml

<Window x:Class="SSS.Izmen"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:SSS"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="Izmen">

    <Grid Background="Lavender">
        <Grid.RowDefinitions>
            <RowDefinition Height="*"></RowDefinition>
            <RowDefinition Height="35"></RowDefinition>
        </Grid.RowDefinitions>
        <StackPanel VerticalAlignment="Center" Width="300" Grid.Row="0">
            <TextBlock Text="Фамилия" Margin="0,5,0,0"></TextBlock>
            <TextBox Background="#0000" Foreground="Black"  Name="Srname"></TextBox>

            <TextBlock Text="Имя" Margin="0,10,0,0"></TextBlock>
            <TextBox Background="#0000" Foreground="Black"  Name="Nam"></TextBox>

            <TextBlock Text="Отчество" Margin="0,10,0,0"></TextBlock>
            <TextBox Background="#0000" Foreground="Black"  Name="Patr"></TextBox>

            <TextBlock Text="День рождения" Margin="0,10,0,0"></TextBlock>
            <DatePicker Name="DateBirth" Background="#0000" Foreground="Black" ></DatePicker>

            <Border BorderThickness="2" CornerRadius="7" BorderBrush="#bababa" Background="White" Height="30" Margin="0,5,0,0">
                <Button   Foreground="Black" FontSize="14" Click="Edit">Изменить</Button>
            </Border>
        </StackPanel>
        <StackPanel Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="3,0,0,0">
            <Border BorderThickness="2" CornerRadius="7" BorderBrush="#bababa" Background="White" Width="100" Height="30">
                <Button   Foreground="Black" Content="Назад" FontSize="16" Click="Back"></Button>
            </Border>
        </StackPanel>
    </Grid>
</Window>