/// <summary>
/// Calculates the FileSystemInfo object's relative path to a DirectoryInfo object
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public static string RelativePathOfItem(this DirectoryInfo directory, FileSystemInfo item)
{
Mandate.That <ArgumentNullException>(item != null);
Mandate.That <ArgumentException>(item.FullName.Contains(directory.FullName));
return(item.FullName.Replace(directory.FullName, String.Empty).TrimStart(Path.DirectorySeparatorChar));
}
