/// <summary>
/// Writes the content.
/// </summary>
/// <param name="writer">The writer.</param>
protected override void WriteContent(PdfWriter writer)
{
PdfStreamWriter psw = writer.Psw;
psw.WriteDouble((double)this.ll_x).WriteSpace();
psw.WriteDouble((double)this.ll_y).WriteSpace();
psw.WriteDouble((double)this.ur_x).WriteSpace();
psw.WriteDouble((double)this.ur_y);
}