vStationURM/Tools/UpgradePackageUploadTool/Extensions/FileSizeConverterExtension.cs

using System;
using System.Globalization;
using System.Windows.Data;
using System.Windows.Markup;

namespace UpgradePackageUploadTool.Extensions
{
    [MarkupExtensionReturnType(typeof(IValueConverter))]
    public class FileSizeConverterExtension : MarkupExtension
    {
        private FileSizeConverter _converter;

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return _converter ?? (_converter = new FileSizeConverter());
        }

        private class FileSizeConverter : IValueConverter
        {
            public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
            {
                if (value is int)
                {
                    return Math.Round((int)value / 1024 / 1024d, 2).ToString() + " MB";
                }
                return "";
            }

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