Concept of pages system using by UserControl

[pawl]

I tried to make application where is one form with Panel control where id displaying user control (page). This page can have button when can call other page which is display to parent panel control. Main from have some BarButton control for quick choose.
Problem is with button on pages. When I moving among pages, is makes multiple calling same pages (it is increase). Why I tried to call helped by events and delegates to main frame but without any improve.
Cut of main form:

public void SwitchPage(pageType pg, string capt)
{            
            gc.Controls.Clear();                        
            pg.parent = this;
            gc.Controls.Add(pg);            

            pg.Left = 20;
            pg.Top = 20;
            pg.Dock = DockStyle.Fill;
            pg.Show();
}

 private void MainWind_Load(object sender, EventArgs e)
{
            pgLogin pg = new pgLogin();
            SwitchPage(pg, null);
}

PageType is main PageControl (for future common parts)

public partial class pageType : DevExpress.XtraEditors.XtraUserControl
{
 
       public bool DiableTextInput = false;
       public MainWind parent;        
       public pageType()
       {
            InitializeComponent();            
       }
    
}

Page Login one of derived from pageType

public partial class pgLogin : TW_HMI.page.pageType
{
        public pgLogin()
        {
            InitializeComponent();
        }

        private void labelControl2_DoubleClick(object sender, EventArgs e)
        {
            pgMain pg = new pgMain();
            parent.SwitchPage(pg, null);
        }
}

Page Login one of derived from pageMain

public partial class pgMain : TW_HMI.page.pageType
{
        public pgLogin()
        {
            InitializeComponent();
        }

        private void labelControl1_DoubleClick(object sender, EventArgs e)
        {
            pgOp1 pg = new pgMain();
            parent.SwitchPage(pg, null);
        }

        private void labelControl2_DoubleClick(object sender, EventArgs e)
        {
            pgLogin pg = new pgLogin();
             parent.SwitchPage(pg, null);
        }

}

I was any better concept ?
Thank for any ideas.