My Custom control is empty

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls.Primitives;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace Colorbox
{
    /// <summary>
    /// Логика взаимодействия для ColorPickerControl.xaml
    /// </summary>
    public  class ColorPickerControl :System.Windows.Controls.Control
    {
      
        static ColorPickerControl()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(ColorPickerControl),new FrameworkPropertyMetadata(typeof(ColorPickerControl)));
            colorproperty = DependencyProperty.Register("Color", typeof(Color), typeof(ColorPickerControl), new FrameworkPropertyMetadata(new PropertyChangedCallback(Oncolorchanged)));
            redproperty = DependencyProperty.Register("Red", typeof(byte), typeof(ColorPickerControl), new FrameworkPropertyMetadata(new PropertyChangedCallback(OnRGBcolorchanged)));
            greenproperty = DependencyProperty.Register("Green", typeof(byte), typeof(ColorPickerControl), new FrameworkPropertyMetadata(new PropertyChangedCallback(OnRGBcolorchanged)));
            blueproperty = DependencyProperty.Register("Blue", typeof(byte), typeof(ColorPickerControl), new FrameworkPropertyMetadata(new PropertyChangedCallback(OnRGBcolorchanged)));
            CommandManager.RegisterClassCommandBinding(typeof(ColorPickerControl), new CommandBinding(ApplicationCommands.Stop, stopexecute));
        }
      
        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();

            RangeBase slider = GetTemplateChild("PART_RedSlider") as RangeBase;
            if (slider != null)
            {
                Binding binding = new Binding("Red");
                binding.Source = this;
                binding.Mode = BindingMode.TwoWay;
                slider.SetBinding(RangeBase.ValueProperty, binding);
            }
            slider = GetTemplateChild("PART_GreenSlider") as RangeBase;
            if (slider != null)
            {
                Binding binding = new Binding("Green");
                binding.Source = this;
                binding.Mode = BindingMode.TwoWay;
                slider.SetBinding(RangeBase.ValueProperty, binding);
            }
            slider = GetTemplateChild("PART_BlueSlider") as RangeBase;
            if (slider != null)
            {
                Binding binding = new Binding("Blue");
                binding.Source = this;
                binding.Mode = BindingMode.TwoWay;
                slider.SetBinding(RangeBase.ValueProperty, binding);
            }

            SolidColorBrush brush = GetTemplateChild("PART_PreviewBrush") as SolidColorBrush;
            if (brush != null)
            {
                Binding binding = new Binding("Color");
                binding.Source = brush;
                binding.Mode = BindingMode.OneWayToSource;
                this.SetBinding(ColorPickerControl.colorproperty, binding);
            }
        }
    }
}

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Colorbox">
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/Colorbox;component/Themes/ColorPickerControl.xaml"/>
    </ResourceDictionary.MergedDictionaries>
  
</ResourceDictionary>

   <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:Colorbox;assembly=Colorbox">
   
    <Style TargetType="{x:Type local:ColorPickerControl}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:ColorPickerControl}">
                    <Border removed="{TemplateBinding Background}"
                  BorderBrush="{TemplateBinding BorderBrush}"
                  BorderThickness="{TemplateBinding BorderThickness}">
                        <Grid>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"></RowDefinition>
                                <RowDefinition Height="Auto"></RowDefinition>
                                <RowDefinition Height="Auto"></RowDefinition>
                            </Grid.RowDefinitions>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition></ColumnDefinition>
                                <ColumnDefinition Width="Auto"></ColumnDefinition>
                            </Grid.ColumnDefinitions>

                            <Slider Name="PART_RedSlider" Minimum="0" Maximum="255" 
                       Margin="{TemplateBinding Padding}"></Slider>
                            <Slider Grid.Row="1" Name="PART_GreenSlider" Minimum="0" Maximum="255"
                       Margin="{TemplateBinding Padding}"></Slider>

                            <Slider Grid.Row="2" Name="PART_BlueSlider" Minimum="0" Maximum="255"
                       Margin="{TemplateBinding Padding}"></Slider>

                            <Rectangle Grid.Column="1" Grid.RowSpan="3"
                         Margin="{TemplateBinding Padding}"
                         Width="50" Stroke="Black" StrokeThickness="1">
                                <Rectangle.Fill>
                                    <SolidColorBrush Color="{Binding Path=Color,
                       RelativeSource={RelativeSource TemplatedParent}}"></SolidColorBrush>
                                </Rectangle.Fill>
                            </Rectangle>

                        </Grid>

                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

xmlns:lib="clr-namespace:Colorbox;assembly=Colorbox" <lib:ColorPickerControl Name="choosecolor2" Color="Red"  Height="200" Width="200" Colorchanged="choosecolor_Colorchanged_1" />