hi ...
i use tree_view nodes to open the application form ... 
this code :
  
if (Operators.ConditionalCompareObjectEqual(tag, (object)"gh", false)) //{
// Form2 db = new Form2();
// db.MdiParent = (Form)this;
// ((Control)db).Show();
////}
////else if (Operators.ConditionalCompareObjectEqual(tag, (object)"Accounts", false))
////{
//// GLAccountsForm glAccountsForm = new GLAccountsForm();
//// glAccountsForm.MdiParent = (Form)this;
//// ((Control)glAccountsForm).Show();
////}
}
 
 butt ---> Operators around the error