StartPage Seite = new StartPage();
            Seite.ViewPage(this.Pages);

 
 
       public void ViewPage(Panel Container)
        {
 
 
            // alle Controls im Container zerstören
            Container.Controls.Clear();
            GC.Collect();

 
        private void grouper1_Click(object sender, EventArgs e)
        {
 
            CodeVendor.Controls.Grouper Test = ( _
              CodeVendor.Controls.Grouper)sender;
 
            CodeVendor.Controls.GrouperContainer Test2 = ( _
              CodeVendor.Controls.GrouperContainer)Test.Parent;
 
            Panel Test3 = (Panel)Test2.Parent;
 
            StartPage X = new StartPage();
            X.ViewPage(Test3);
 
        }