public PrincipalItemUI(PrincipalUI frmPrincipal)
{
this.frmPrincipal = frmPrincipal;
principalItemRepository = EntityContainer.GetType <IPrincipalItemRepository>();
InitializeComponent();
}
private void mnuPrincipal_Click(object sender, EventArgs e)
{
var frmPrincipal = new PrincipalUI();
frmPrincipal.MdiParent = this;
frmPrincipal.Show();
}