private void OpenFormInternal <T>(IEntityForm <T> form, ListViewKey key, T entity)
where T : IIdEntity
{
form.LoadEntity(entity);
form.EntitySave += new EntitySaveEventHandler(form_EntitySave);
if (CurrentFormTab.Controls.Count == 0 || CurrentFormTab.Controls[0] != form)
{
form.Dock = DockStyle.Fill;
form.Name = key.ToString() + "Form";
CurrentFormTab.Controls.Clear();
CurrentFormTab.Controls.Add(form.ToControl());
}
}