MainView.xaml

<UserControl x:Class="DXDocumentUIServiceSample.View.MainView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
             xmlns:vm="clr-namespace:DXDocumentUIServiceSample.ViewModel">

    <UserControl.DataContext>
        <vm:MainViewModel />
    </UserControl.DataContext>

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <GroupBox Header="Users">
            <dxg:GridControl Name="grid" ItemsSource="{Binding Users}">
                <dxg:GridControl.Columns>
                    <dxg:GridColumn FieldName="NickName" />
                    <dxg:GridColumn FieldName="Registration" />
                    <dxg:GridColumn FieldName="Rating" />
                </dxg:GridControl.Columns>
                <dxg:GridControl.View>
                    <dxg:TableView AllowEditing="False"
                                   AutoWidth="True"
                                   FadeSelectionOnLostFocus="False"
                                   VerticalScrollbarVisibility="Auto"
                                   RowDoubleClickCommand="{Binding DoubleClickCommand}" />
                </dxg:GridControl.View>
            </dxg:GridControl>
        </GroupBox>
        <GroupBox Grid.Row="1">
            <StackPanel Orientation="Horizontal">
                <Button Margin="4,2"
                        Command="{Binding CreateDocumentCommand}"
                        CommandParameter="{Binding ElementName=grid, Path=CurrentItem}"
                        Content="Create Document" />
            </StackPanel>
        </GroupBox>
    </Grid>
</UserControl>