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Decimal ScrollBar Window with extending IValueConverter

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         xmlns:src="clr-namespace:MyNameSpace.DecimalScrollBar"          Title="Decimal ScrollBar">     <Window.Resources>         <src:DoubleToDecimalConverter x:Key="conv" />     </Window.Resources>     <StackPanel>         <ScrollBar Name="scroll"                    Orientation="Horizontal" Margin="24"                     Maximum="100" LargeChange="10" SmallChange="1" />         <Label HorizontalAlignment="Center"                 Content="{Binding ElementName=scroll, Path=Value,                      Converter={StaticResource conv}, ConverterParameter=2}" />     </StackPanel> </Window> //File:Window.xaml.cs using System; using System.Globalization; using System.Windows; using System.Windows.Data; namespace MyNameSpace.DecimalScrollBar {     [ValueConversion(typeof(double), typeof(decimal))]     public class DoubleToDecimalConverter : IValueConverter     {         public object Convert(object value, Type typeTarget,object param, CultureInfo culture)         {             decimal num = new Decimal((double)value);             if (param != null)                 num = Decimal.Round(num, Int32.Parse(param as string));             return num;         }         public object ConvertBack(object value, Type typeTarget,                                    object param, CultureInfo culture)         {             return Decimal.ToDouble((decimal)value);         }     } }