/// <summary>
/// Checks whether a certain sub-directory exists.
/// </summary>
/// <param name="path">The path of the directory.</param>
/// <returns>
/// <see langword="true" /> if the directory exists, <see langword="false" /> otherwise.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="path" /> is <see langword="null" /> (<see langword="Nothing" />
/// in Visual Basic).
/// </exception>
public bool Exists(string path)
{
_ = Requires.NotNullOrWhiteSpace(
path,
nameof(path));
return(FSDir.Exists(path));
}