WPF Customize Button ControlTemplate TextBlock

//xaml
<UserControl x:Class="WpfApp332.BtnTbk"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WpfApp332"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <Button Width="200" Height="50" Background="{Binding BgBrush,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">
            <Button.Template>
                <ControlTemplate>
                    <TextBlock Text="{Binding TbkStr,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                       HorizontalAlignment="Left"/>
                </ControlTemplate>
            </Button.Template>
        </Button>        
    </Grid>
</UserControl>


//cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
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 WpfApp332
{
    /// <summary>
    /// Interaction logic for BtnTbk.xaml
    /// </summary>
    public partial class BtnTbk : UserControl
    {
        public BtnTbk()
        {
            InitializeComponent();
            this.DataContext = this;
        }



        public SolidColorBrush BgBrush
        {
            get { return (SolidColorBrush)GetValue(BgBrushProperty); }
            set { SetValue(BgBrushProperty, value); }
        }

        // Using a DependencyProperty as the backing store for BgBrush.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty BgBrushProperty =
            DependencyProperty.Register("BgBrush", typeof(SolidColorBrush), 
                typeof(BtnTbk), new PropertyMetadata(new SolidColorBrush(Colors.Red)));



        public string TbkStr
        {
            get { return (string)GetValue(TbkStrProperty); }
            set { SetValue(TbkStrProperty, value); }
        }

        // Using a DependencyProperty as the backing store for TbkStr.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty TbkStrProperty =
            DependencyProperty.Register("TbkStr", typeof(string), 
                typeof(BtnTbk), new PropertyMetadata(""));




    }
}

//xaml
<UserControl x:Class="WpfApp332.BtnTbk"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WpfApp332"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Grid>
        <Button Width="200" Height="50" Background="{Binding BgBrush,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">
            <Button.Template>
                <ControlTemplate>
                    <TextBlock Text="{Binding TbkStr,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"
                       HorizontalAlignment="Left"/>
                </ControlTemplate>
            </Button.Template>
        </Button>        
    </Grid>
</UserControl>



//xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
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 WpfApp332
{
    /// <summary>
    /// Interaction logic for BtnTbk.xaml
    /// </summary>
    public partial class BtnTbk : UserControl
    {
        public BtnTbk()
        {
            InitializeComponent();
            this.DataContext = this;
        }



        public SolidColorBrush BgBrush
        {
            get { return (SolidColorBrush)GetValue(BgBrushProperty); }
            set { SetValue(BgBrushProperty, value); }
        }

        // Using a DependencyProperty as the backing store for BgBrush.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty BgBrushProperty =
            DependencyProperty.Register("BgBrush", typeof(SolidColorBrush), 
                typeof(BtnTbk), new PropertyMetadata(new SolidColorBrush(Colors.Red)));



        public string TbkStr
        {
            get { return (string)GetValue(TbkStrProperty); }
            set { SetValue(TbkStrProperty, value); }
        }

        // Using a DependencyProperty as the backing store for TbkStr.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty TbkStrProperty =
            DependencyProperty.Register("TbkStr", typeof(string), 
                typeof(BtnTbk), new PropertyMetadata(""));




    }
}







<Window x:Class="WpfApp332.MainWindow"
        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:WpfApp332"
        mc:Ignorable="d" WindowState="Maximized"
        Title="MainWindow" Height="450" Width="800">
    <UniformGrid x:Name="uniformGrid">
         
    </UniformGrid>
</Window>





using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
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 WpfApp332
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        Random rnd { get; set; }
        public MainWindow()
        {
            rnd = new Random();
            InitializeComponent();
            this.Loaded += MainWindow_Loaded;
        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            for(int i=0;i<200;i++)
            {
                BtnTbk btn = new BtnTbk();
                btn.Background = new SolidColorBrush(Color.FromRgb((byte)rnd.Next(255), (byte)rnd.Next(255), (byte)rnd.Next(255)));
                btn.TbkStr=(i+1).ToString();
                if(!uniformGrid.Children.Contains(btn))
                {
                    uniformGrid.Children.Add(btn);
                }
            }
        } 
    }
}