OdbcDataReader Sqlite DB reading strange results

This method is returning some strange results and was wondering if someone could explain why this is happening and maybe a solution to get my desired results.

Results:

FileName = what i expect

FileSize = what I expect

Buffer = all bytes = 0

BytesRead = 0

BlobString = binary data string

FieldType = BLOB (what I would expect)

ColumnType = System.String

In addition, if the file exceeds several kilobytes, the reader will throw an exception indicating that the StringBuilder's capacity argument must be greater than zero (presumably because the size is larger than Int32.MaxValue).

I guess my question is how to read large BLOB files from OdbcDataReader correctly?

    public static String SaveBinaryFile(String Key)
    {
        try
        {
            Connect();

            OdbcCommand Command = new OdbcCommand("SELECT [_filename_],[_filesize_],[_content_] FROM [_sys_content] WHERE [_key_] = '" + Key + "';", Connection);
            OdbcDataReader Reader = Command.ExecuteReader(CommandBehavior.SequentialAccess);

            if (Reader.HasRows == false)
                return null;

            String FileName = Reader.GetString(0);
            int FileSize = int.Parse(Reader.GetString(1));
            byte[] Buffer = new byte[FileSize];
            long BytesRead = Reader.GetBytes(2, 0, Buffer, 0, FileSize);

            String BlobString = (String)Reader["_content_"];
            String FieldType = Reader.GetDataTypeName(2);
            Type ColumnType = Reader.GetFieldType(2);

            return null;
        }
        catch (Exception ex)
        {
            Tools.ErrorHandler.Catch(ex);
            return null;
        }
    }