WPF

<Canvas  Width="772" Name="Canvas2" Height="464" >

            <Canvas.OpacityMask>
                <VisualBrush Stretch="Fill" Viewbox="0,0,800,600" ViewboxUnits="Absolute" Viewport="0,0,800,600" ViewportUnits="Absolute">
                    <VisualBrush.Visual>
                        <Canvas Width="800" Height="600" Background="#1000" >
                            <!--<Button Name="VisualButton"  Width="215" Height="110" Canvas.Left="20" Canvas.Top="20" Background="#0000">-->
                                <Button x:Name="VisualButton1" Width="200" Height="100"  BorderBrush="#0000" BorderThickness="100"  />

                           <!-- </Button>-->
                            <!--<Rectangle Stroke="#9000"  StrokeThickness="3" Width="225" Height="120" Canvas.Left="2" Canvas.Top="20"></Rectangle>
                            <Rectangle Name="VisualButton"  Width="215" Height="110" Canvas.Left="20" Canvas.Top="20"  Fill="Azure">-->
                                <!--<Button x:Name="VisualButton1" Width="200" Height="100"  BorderBrush="#0000" BorderThickness="100"  />

                            </Rectangle>-->
                        </Canvas>

                    </VisualBrush.Visual>
                </VisualBrush>
                <!--<VisualBrush Visual="{Binding ElementName=Shape}" Stretch="None"  />-->
            </Canvas.OpacityMask>

<Canvas.Background>
                <ImageBrush ImageSource="C:\Users\Public\Pictures\Sample Pictures\Desert.jpg" />
            </Canvas.Background>

</Canvas>

public class User : INotifyPropertyChanged
{
    string _firstName;
    public string FirstName {
        get { return _firstName; }
        set { 
            _firstName = value;
            OnPropertyChanged("FirstName");
            OnPropertyChanged("FullName");
        }
    }

    string _lastName;
    public string LastName {
        get { return _lastName; }
        set { 
            _lastName = value;
            OnPropertyChanged("LastName");
            OnPropertyChanged("FullName");
        }
    }

    public string FullName
    {
        get { return string.Format("{0} {1}", FirstName, LastName); }
    }

    int _gender;
    public int Gender {
        get { return _gender; }
        set { 
            _gender = value;
            OnPropertyChanged("Gender");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected void OnPropertyChanged(string name)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(name));
        }
    }
}

public class UserListingViewModel : INotifyPropertyChanged
{
    public UserListingViewModel()
    {
        LoadDataUser();
    }

    public void LoadDataUser()
    {
        ComboUserData = new ObservableCollection<User>();

        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings[
            "dLondre.Properties.Settings.CSLONDRE"].ConnectionString);

        string str = "";
        str += "SELECT userid,firstname + ' ' + lastname as name FROM [user] ";

        SqlCommand com = con.CreateCommand();
        com.CommandText = str;

        try
        {
            con.Open();
            SqlDataReader sdr = com.ExecuteReader();
            while (sdr.Read())
            {
                ComboUserData.Add(new User { UserID = (string)sdr["userid"], FirstName = (string)sdr["name"]});
            }

            com.Dispose();
            con.Close();
            con.Dispose();
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
        }
    }


    ObservableCollection<User> _comboUserData;
    public ObservableCollection<User> ComboUserData
    {
        get
        {
            if (_comboUserData == null)
                _comboUserData = new ObservableCollection<User>();
            return _comboUserData;
        }
        set
        {
            if (value != _comboUserData)
                _comboUserData = value;
            OnPropertyChanged("ComboUserData");
        }
    }

    User _user;
    public User SelectedUserID
    {
        get { return _user; }
        set
        {
            _user = value;
            OnPropertyChanged("SelectedUserID");
        }
    }
}

<ComboBox x:Name="DDUserId" 
     Width="140" 
     DisplayMemberPath="FirstName" 
     IsSynchronizedWithCurrentItem="True" 
     ItemsSource="{Binding ComboUserData,Mode=TwoWay}" 
     SelectedItem="{Binding SelectedUserID}">
</ComboBox>

<controls:TreeViewEx BorderThickness="0"
                        Margin="5" 
                        ItemsSource="{Binding Nodes}"
                        IsManipulationEnabled ="True"
                        Visibility="{Binding ShowTree, Converter={StaticResource visibilityConverter}}">

    <controls:TreeViewEx.Resources>
        <SolidColorBrush Color="Transparent" x:Key="{x:Static SystemColors.HighlightBrushKey}"/>
    </controls:TreeViewEx.Resources>

</controls:TreeViewEx>

<HierarchicalDataTemplate DataType="{x:Type models:JobSummaryModel}"
                            ItemsSource="{Binding Path=Nodes}">
    <Grid Margin="2">

        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition Width="Auto"/>
        </Grid.ColumnDefinitions>
                    
        <controls:TextBlockEx Grid.Column="1"
                                FontSize="12">
                        
            <Hyperlink Style="{StaticResource linkStyle}"
                        Command="{Binding SelectedNodeCommand}">
                <TextBlock Text="{Binding Caption}"/>
            </Hyperlink>
                        
        </controls:TextBlockEx>
                    
    </Grid>
</HierarchicalDataTemplate>