BytesToString

gistfile1.cs

public static string BytesToString(long byteSize)
{
    const string format = "{0} {1}";
    const int orderBase = 1024;
    var units = new[] {"B", "KB", "MB", "GB", "TB", "PB", "EB"};

    if (byteSize == 0)
        return "0 B";
    var order = Convert.ToInt32(Math.Floor(Math.Log(byteSize, orderBase)));
    var rescaledSize = Math.Round(byteSize/Math.Pow(orderBase, order), 1);
    return string.Format(format, rescaledSize, units[order]);
}