ProgressBar with percent text

If you want a progress bar with text two colors you can use this

   public class ProgressBarText : ProgressBar
    {
        static ProgressBarText()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(ProgressBarText), new FrameworkPropertyMetadata(typeof(ProgressBarText)));
        }

        #region IndicatorColor (DP SHORT)
        public Brush IndicatorColor { get { return (Brush)GetValue(IndicatorColorProperty); } set { SetValue(IndicatorColorProperty, value); } }
        public static readonly DependencyProperty IndicatorColorProperty = DependencyProperty.Register("IndicatorColor",
            typeof(Brush), 
            typeof(ProgressBarText), 
            new FrameworkPropertyMetadata(Brushes.Blue, FrameworkPropertyMetadataOptions.AffectsRender));
        #endregion

        #region IndicatorTextColor (DP SHORT)
        public Brush IndicatorTextColor { get { return (Brush)GetValue(IndicatorTextColorProperty); } set { SetValue(IndicatorTextColorProperty, value); } }
        public static readonly DependencyProperty IndicatorTextColorProperty = DependencyProperty.Register("IndicatorTextColor", 
            typeof(Brush), 
            typeof(ProgressBarText), 
            new FrameworkPropertyMetadata(Brushes.White, FrameworkPropertyMetadataOptions.AffectsRender));
        #endregion

        #region TextColor (DP SHORT)
        public Brush TextColor { get { return (Brush)GetValue(TextColorProperty); } set { SetValue(TextColorProperty, value); } }
        public static readonly DependencyProperty TextColorProperty = DependencyProperty.Register("TextColor", 
            typeof(Brush), 
            typeof(ProgressBarText), 
            new FrameworkPropertyMetadata(Brushes.Black, FrameworkPropertyMetadataOptions.AffectsRender));
        #endregion 
    }

    public class ProgressBarTextConverter : MarkupExtension, IMultiValueConverter
    {
        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }

        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
        {
            try
            {
                double total = (double)values[0];
                double size = (double)values[1];
                double calc= (size * 100 / total);
                Console.WriteLine($"CALCUL  = {calc}");
                int v = (int)Math.Round(calc);
                return $"{v} %";
            }
            catch { }
            return null;
        }

        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

and style in generic.xaml

 <Style TargetType="{x:Type local:ProgressBarText}">
        <Setter Property="BorderBrush"
                Value="gray" />
        <Setter Property="BorderThickness"
                Value="0.5" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:ProgressBarText}">
                    <Border Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}">
                        <Grid>
                            <Grid x:Name="PART_Track">
                                <TextBlock x:Name="PART_Text"
                                           Grid.Column="1"
                                           Foreground="{TemplateBinding TextColor}"
                                           VerticalAlignment="Center"
                                           HorizontalAlignment="Center">
                                    <TextBlock.Text>
                                        <MultiBinding Converter="{local:ProgressBarTextConverter}">
                                            <Binding Path="ActualWidth"
                                                     ElementName="PART_Track" />
                                            <Binding Path="ActualWidth"
                                                     ElementName="PART_Indicator" />
                                        </MultiBinding>
                                    </TextBlock.Text></TextBlock>
                            </Grid>
                            <Border Background="{TemplateBinding IndicatorColor}"
                                    VerticalAlignment="Stretch"
                                    HorizontalAlignment="Left"
                                    x:Name="PART_Indicator">
                                <Grid Width="{Binding ActualWidth, ElementName=PART_Track}">
                                    <TextBlock Text="{Binding Text, ElementName=PART_Text}"
                                               Foreground="{TemplateBinding IndicatorTextColor}"
                                               Grid.Column="1"
                                               VerticalAlignment="Center"
                                               HorizontalAlignment="Center" />
                                </Grid>
                            </Border>
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

result for

code

<local:ProgressBarText Margin="10,112,9.6,0"
      Height="41"
      TextBlock.FontSize="24"
      TextBlock.FontWeight="Bold"
      TextColor="red"
      IndicatorTextColor="Black"
      VerticalAlignment="Top"
      Value="49"
      IndicatorColor="Lime" />
<local:ProgressBarText Margin="10,158,9.6,0"
      Height="41"
      TextBlock.FontSize="24"
      TextBlock.FontWeight="Bold"
      VerticalAlignment="Top"
      Value="49" />