demoekz/Cafe/AdminPage.xaml

<Page x:Class="Cafe.AdminPage"
      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:Cafe"
      mc:Ignorable="d" 
      d:DesignHeight="450" d:DesignWidth="800"
      Title="AdminPage">

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="300"/>
        </Grid.ColumnDefinitions>
        <DataGrid Name="UserGrid" HorizontalAlignment="Left" AutoGenerateColumns="False" Width="500">
            <DataGrid.Columns>
                <DataGridTextColumn Header="Surname" Binding="{Binding Surname}"></DataGridTextColumn>
                <DataGridTextColumn Header="Name" Binding="{Binding Name}"></DataGridTextColumn>
                <DataGridTextColumn Header="Patronymic" Binding="{Binding Patronymic}"></DataGridTextColumn>
                <DataGridTextColumn Header="Status" Binding="{Binding IsActive}"></DataGridTextColumn>
                <DataGridTextColumn Header="Login" Binding="{Binding Login}"></DataGridTextColumn>
                <DataGridTextColumn Header="Password" Binding="{Binding Password}"></DataGridTextColumn>
                <DataGridTextColumn Header="Role" Binding="{Binding Role.NameOfRole}"></DataGridTextColumn>
            </DataGrid.Columns>
        </DataGrid>
        <StackPanel Grid.Column="1" HorizontalAlignment="Center" Orientation="Vertical" VerticalAlignment="Center">
            <Button  Height="35" Width="90" Margin="10" Name="AddUserBtn" Click="AddUserBtn_Click">Add user</Button>
            <Button  Height="35" Width="90" Margin="10" Name="ChangeStatusBtn" Click="ChangeStatusBtn_Click">Change status</Button>
            <Button  Height="35" Width="90" Margin="10" Name="GetAllOrdersBtn" Click="GetAllOrdersBtn_Click">All orders</Button>
            <Button  Height="35" Width="90" Margin="10" Name="AddOnShiftBtn" Click="AddOnShiftBtn_Click">Add on shift</Button>
        </StackPanel>
    </Grid>
</Page>