private int GetApostropheCharEntity(int offset, int length)
{
byte[] buffer = _buffer;
if (length != 6 ||
buffer[offset + 1] != (byte)'a' ||
buffer[offset + 2] != (byte)'p' ||
buffer[offset + 3] != (byte)'o' ||
buffer[offset + 4] != (byte)'s')
{
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
}
return (int)'\'';
}