private int GetAmpersandCharEntity(int offset, int length)
{
byte[] buffer = _buffer;
if (length != 5 ||
buffer[offset + 1] != (byte)'a' ||
buffer[offset + 2] != (byte)'m' ||
buffer[offset + 3] != (byte)'p')
{
XmlExceptionHelper.ThrowInvalidCharRef(_reader);
}
return (int)'&';
}