if (mail.Uidl == "AAwoog6AAAg3IPZCNqr7CyUVnktCyInF")
            {
                mail.Content = Convert
                                .ToBase64String(File.ReadAllBytes(@"C:\Users\Arm79\Documents\Книги\Программирование\C#\C# 2 in depth (english).pdf"))
                                .Substring(0, 43008); // с этим значением еще пишется в БД
            }

            var _csb = new SQLiteConnectionStringBuilder()
                           {
                               DataSource = @"C:\Users\Arm79\db.db",
                               PageSize = 32768,
                               MaxPageCount = int.MaxValue
                           };
            
            using (var _con = new SQLiteConnection(_csb.ConnectionString) )
            {
                _con.Open();
                try
                {
                    using (var _cmd = new SQLiteCommand(_con) { CommandType = CommandType.Text, CommandText = "insert into [RawMails] ([rawmail_id], [rawmail_moment], [rawmail_content]) values (@rawmail_id, @rawmail_moment, @rawmail_content)"})
                    {
                        _cmd.Parameters.AddRange(
                            new SQLiteParameter[]
                                {
                                    new SQLiteParameter("@rawmail_id", DbType.String, 100) {Value = mail.Uidl}, 
                                    new SQLiteParameter("@rawmail_moment", DbType.DateTime) {Value = mail.Received},
                                    new SQLiteParameter("@rawmail_content", DbType.String, 504857600) {Value = mail.Content}
                                });

                        _cmd.ExecuteNonQuery();
                    }
                }
                finally
                {
                    _con.Close();
                }
            }

new SQLiteParameter("@rawmail_content", DbType.String, 504857600) {Value = mail.Content}

            
            String s = "";
            for (int i = 0; i < 500000; i++)
            {
                s += "a";
            }
            cmd.Parameters.AddRange(new SQLiteParameter[]
                                {
                                    new SQLiteParameter("@par1", DbType.Int32, 10) {Value = 1}, 
                                    new SQLiteParameter("@par2", DbType.String, 504857600) {Value = s}
                                });
            cmd.ExecuteNonQuery();

String s = "";
            for (int i = 0; i < 500000; i++)
            {
                s += "a";
            }

string s = new string('a', 500000);