Close() Dispose()

Hi Guys, i've got a Form that i call and in the constructor it does some db processing, in some cases the db will return a null row so rather than show the form i want to display a message "Cannot find bal bal" and then Close/Dispose the form before it shows. it works fine except that the Close() methos is ignored and the form always shows. i tried dispose and again it continue exceuting until an exception, cannot access disposed resource.... public Form() { try { DataTable tbl = DB.GetData(); if(tbl.Rows.Count>0) { //Do As Normal } else { Close(); } //do some more processing } } but the close call never takes effect it continues on and does more processing.. has anyone seen this before, kind regards michael