public class BaseFactory 
 {

   private static BaseFactory  m_Single;

   private BaseFactory()
   {
 	Collection = new List<BaseType>;

   }

   public static BaseFactory GetFactory ()
   {
	if ( null == m_Single )
        {
		m_Single = new BaseFactory()
	}
	return m_Singele;
   }

   public IList<BaseType> Collection
   {
      get;
      private set;
   }

 }

 Void OnSave ()
 {
   BaseFactory.GetFactory().Add( new Person()  {Id = 1, Title ="Person1" } );    
 }

Void OnSave ()
 {
   BaseFactory.GetFactory().AddRange ( 
   new [] BaseType {  new Question ()  { Title ="Question1" },  new Question ()  { Title ="Question2" } }
   );    
 }

OnShow ()
 {
	foreach ( BaseType item in BaseFactory.GetFactory() )
	{
		GridAddRow ( item.Title );
	}
 }