MVVM Dynamic Commands

using System;
using System.Windows.Data;

namespace ListBoxHyperlinkDemo.ViewModel
{
    [ValueConversion(typeof(string), typeof(string))]
    public class PaddedStringConverter: IValueConverter
    {
        #region IValueConverter Members

        public object Convert(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return String.Format("{0} ", value);
        }

        public object ConvertBack(object value, System.Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string s = value.ToString();
            char[] c = new char[] {' '};
            return s.TrimEnd(c);
        }

        #endregion
    }
}