public void WriteApostropheCharEntity()
{
int offset;
byte[] buffer = GetBuffer(6, out offset);
buffer[offset + 0] = (byte)'&';
buffer[offset + 1] = (byte)'a';
buffer[offset + 2] = (byte)'p';
buffer[offset + 3] = (byte)'o';
buffer[offset + 4] = (byte)'s';
buffer[offset + 5] = (byte)';';
Advance(6);
}