public static SQLiteConectar GetInstance()
 {
     if (SQLiteConectar.conSQLite == null)
     {
         SQLiteConectar.conSQLite = new SQLiteConectar();
     }
     return(SQLiteConectar.conSQLite);
 }
        public static void Conectar(string bancoDados)
        {
            switch (bancoDados)
            {
            case "M":
                mySql = MySqlConectar.GetInstance();
                break;

            case "L":
                sqlLite = SQLiteConectar.GetInstance();
                break;

            case "F":
                fb = FbConectar.GetInstance();
                break;
            }
        }