Cafe/Cafe2/ListWindows/EmployeesListWindow.xaml

<Window x:Class="Cafe.ListWindows.EmployeesListWindow"
        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:Cafe.ListWindows"
        mc:Ignorable="d"
        Title="Список сотрудников" Height="900" Width="1600" WindowStartupLocation="CenterScreen" ResizeMode="CanMinimize">
    <Grid>
        <Button x:Name="BackButton" Content="Назад" HorizontalAlignment="Left" Margin="20,17,0,0" VerticalAlignment="Top" Height="39" Width="140" FontSize="25" Click="BackButtonClick"/>
        <DataGrid x:Name="EmployeesList" AutoGenerateColumns="False" Height="600" Margin="130,158,0,0" VerticalAlignment="Top" HorizontalAlignment="Left" Width="1340"
            RowHeaderStyle="{StaticResource RowHeaderStyle}" ColumnHeaderStyle="{StaticResource ColumnHeaderStyle}">
            <DataGrid.ItemContainerStyle>
                <Style TargetType="{x:Type DataGridRow}">
                    <EventSetter Event="Control.MouseDoubleClick" Handler="EmployeesListMouseDoubleClick"/>
                </Style>
            </DataGrid.ItemContainerStyle>
            <DataGrid.Columns>
                <DataGridTextColumn Binding="{Binding SecondName}" Header="Фамлия" Width="330" IsReadOnly="True"/>
                <DataGridTextColumn Binding="{Binding FirstName}" Header="Имя" Width="330" IsReadOnly="True"/>
                <DataGridTextColumn Binding="{Binding MiddleName}" Header="Отчество" Width="330" IsReadOnly="True"/>
                <DataGridTextColumn Binding="{Binding Roles.RoleName}" Header="Должность" Width="330" IsReadOnly="True"/>
            </DataGrid.Columns>
        </DataGrid>
        <TextBox x:Name="Search" HorizontalAlignment="Left" Margin="130,99,0,0" TextWrapping="Wrap" Text="Поиск" VerticalAlignment="Top" Width="1340" Height="30" FontSize="20" 
            Foreground="#FF675B5B" PreviewMouseLeftButtonUp="SearchPreviewMouseLeftButtonUp" LostFocus="SearchLostFocus" TextChanged="SearchTextChanged"/>
    </Grid>
</Window>