private void WriteStartXmlnsAttribute()
{
int offset;
byte[] buffer = GetBuffer(6, out offset);
buffer[offset + 0] = (byte)' ';
buffer[offset + 1] = (byte)'x';
buffer[offset + 2] = (byte)'m';
buffer[offset + 3] = (byte)'l';
buffer[offset + 4] = (byte)'n';
buffer[offset + 5] = (byte)'s';
Advance(6);
_inAttribute = true;
}