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ds = db.querySelectionSQL("SELECT COUNT(Passwort) FROM Login WHERE Benutzer = textBox2.Text AND Passwort = textBox1.Text");
                          
                if( = 0) //Hier weiß ich nicht weiter.
                {
                    Close(); 
                }
                else
                {
                    ds1 = db.querySelectionSQL("SELECT Benutzer FROM Login WHERE Passwort = textBox1.Text");                   
                    if (textBox2.Text.Equals(row.ItemArray[0]))
                    {
                        nutzer = true;
                    }
                    else
                    {
                        Close(); 
                    }
                    
                }