/// <summary>
/// Invoked when <see cref="ToDTO"/> operation is about to return.
/// </summary>
/// <param name="dto"><see cref="ClientDTO"/> converted from <see cref="Client"/>.</param>
partial static void OnDTO(this Client entity, ClientDTO dto);
/// <summary>
/// Converts this instance of <see cref="Client"/> to an instance of <see cref="ClientDTO"/>.
/// </summary>
/// <param name="entity"><see cref="Client"/> to convert.</param>
public static ClientDTO ToDTO(this Client entity)
{
if (entity == null) return null;
var dto = new ClientDTO();
dto.ClientID = entity.ClientID;
dto.FirstName = entity.FirstName;
dto.LastName = entity.LastName;
entity.OnDTO(dto);
return dto;
}