for_vika/praktika_2/MainWindow.xaml

<Window x:Class="praktika_2.MainWindow"
        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:praktika_2"
        mc:Ignorable="d"
         Title="Ввод данных поступления" Height="600" Width="800"  WindowStartupLocation="CenterScreen">
    <Grid  Background="#00BFFF">
        <Grid.RowDefinitions>
            <RowDefinition Height="47*"/>
            <RowDefinition Height="26*"/>
        </Grid.RowDefinitions>
        <TextBlock Text="Материальная ценность:" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="15,0,635,0"/>
        <ComboBox  x:Name="mat_cen" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="15,20,435,0"/>
        <TextBlock Text="Количество:" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="375,0,275,0"/>
        <TextBox x:Name="count"  Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="375,20,325,0"/>
        <TextBlock Text="Номер и дата документа:" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="575,0,75,0"/>
        <TextBox x:Name="Number_doc"  Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="490,20,10,0"/>
        <TextBlock Text="Организация:" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="15,50,635,0"/>
        <ComboBox  Name="Organization" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="15,70,335,0"/>
        <TextBlock Text="Стоимость за 1 ед:" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="575,50,75,0"/>
        <TextBox  Name="Stoimost" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="490,70,10,0"/>
        <TextBlock Text="Размер:" Height="20" VerticalAlignment="Top" Margin="15,101,635,0"/>
        <TextBox x:Name="Size"  Height="20" VerticalAlignment="Top" Margin="15,121,685,0"/>
        <TextBlock Text="Ширина:" Height="20" VerticalAlignment="Top" Margin="125,101,525,0"/>
        <TextBox x:Name="Wigth"  Height="20" VerticalAlignment="Top" Margin="125,121,575,0"/>
        <TextBlock Text="Длина:" Height="20" VerticalAlignment="Top" Margin="236,101,414,0"/>
        <TextBox x:Name="Length"  Height="20" VerticalAlignment="Top" Margin="235,121,465,0"/>
        <TextBlock Text="Высота:" Height="20" VerticalAlignment="Top" Margin="350,101,300,0"/>
        <TextBox Name="Heigth"  Height="20" VerticalAlignment="Top" Margin="348,121,352,0"/>
        <TextBlock Text="Серийный номер:" Height="20" VerticalAlignment="Top" Margin="465,101,185,0"/>
        <TextBox Name="Series_number"  Height="20" VerticalAlignment="Top" Margin="465,121,185,0"/>
        <TextBlock Text="Примечание" Height="20" Grid.Row="0" VerticalAlignment="Top" Margin="15,150,635,0"/>
        <TextBox Name="Prim" Grid.Row="0" Margin="15,173,585,173" Height="150"/>

        <Button Grid.Row="1" Height="50" Width="250" Margin="-475 -100 0 0" Content="оформить запись учета" Click="Zapis"/>
        <Button Grid.Row="1" Height="50" Width="250" Margin="100 -100 0 0" Content="открыть инвентарную карточку"/>
        <Button Grid.Row="1" Height="30" Width="50" Margin="500 -100 0 0"/>
        <Button Grid.Row="1" Height="30" Width="50" Margin="650 -100 0 0"/>
        <TextBlock Text="Если категория МЦ не относится к расходным материалам, то при сохранении записи будут доступны кнопки «оформить запись учёта» и «открыть инвентарную карточку»" TextWrapping="Wrap" Grid.Row="1" FontSize="14" Margin="10 150 0 0"/>
    </Grid>
</Window>