How to bind a key of linq into xaml listview

Question

I need Regions list on my UI.Here key is the Region. How bind the key on xaml(UI) as listview.

 

MainViewModel 

public ObservableCollection<WorkItem>ItemDetails { get; set; }

public class WorkItem
{
    public string country { get; set; }
    public string capital { get; set; }
    public string Region { get; set; }
    public string S_region { get; set; }
    public double? Area { get; set; }
    public int Population { get; set; }
}

this is the linq query that i wrote to group items by Region Property.

var queryRegion = from s in ItemDetails
                              group s by s.Region into newGroup
                              orderby newGroup.Key
                              select newGroup;

 MainPage.xaml

 

<Grid>
        <TextBlock Text="Regions: " Foreground="White" FontSize="20" Margin="10,20,0,0" FontWeight="Bold"/>

        <ListView Background="White" Margin="10,70,0,0" FontSize="60"
                  FontWeight="Bold"
                 Foreground="Black" ItemsSource="{Binding queryRegion}"
                  VerticalAlignment="Stretch"
                  HorizontalAlignment="Stretch"
                 IsItemClickEnabled="True"
                  ItemClick="ListView_ItemClick">

        <ListView.ItemContainerStyle >
                <Style TargetType="ListViewItem" >
                    <Setter Property="FontSize"
                            Value="20"  />
                        <Setter Property="BorderBrush" Value="LightGray" />
                        <Setter Property="BorderThickness" Value="0,0,0,01"/>
                    <Setter Property="Margin" Value="10,0,0,0"/>

                </Style>
            </ListView.ItemContainerStyle>
            <ListView.ItemTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding queryRegion.Key}" Foreground="Black"/>
                </DataTemplate>
            </ListView.ItemTemplate>

        </ListView>

    </Grid>