read bytes

public static byte[] ReadFully(this Stream stream)
{
    using (MemoryStream memoryStream = new MemoryStream())
    {
        byte[] buffer = new byte[8192];
        int bytesRead;
        while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
        {
            memoryStream.Write(buffer, 0, bytesRead);
        }
        return memoryStream.ToArray();
    }
}