Bagaimana Cara Membaca 10 Baris Terakhir Fail Teks Besar dengan Cekap?

public static string ReadEndTokens(string path, Int64 numberOfTokens, Encoding encoding, string tokenSeparator)
{
    int sizeOfChar = encoding.GetByteCount("\n");
    byte[] buffer = encoding.GetBytes(tokenSeparator);

    using (FileStream fs = new FileStream(path, FileMode.Open))
    {
        Int64 tokenCount = 0;
        Int64 endPosition = fs.Length / sizeOfChar;

        for (Int64 position = sizeOfChar; position < endPosition; position += sizeOfChar)
        {
            fs.Seek(-position, SeekOrigin.End);
            fs.Read(buffer, 0, buffer.Length);

            if (encoding.GetString(buffer) == tokenSeparator)
            {
                tokenCount++;
                if (tokenCount == numberOfTokens)
                {
                    byte[] returnBuffer = new byte[fs.Length - fs.Position];
                    fs.Read(returnBuffer, 0, returnBuffer.Length);
                    return encoding.GetString(returnBuffer);
                }
            }
        }

        // Handle the case where the file has fewer than numberOfTokens lines
        fs.Seek(0, SeekOrigin.Begin);
        buffer = new byte[fs.Length];
        fs.Read(buffer, 0, buffer.Length);
        return encoding.GetString(buffer);
    }
}