wpf 弹出聊天表情效果

using IM.ImageExtender;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows.Documents;

namespace IM
{
    public class ChatProcess
    {
        /// 

        /// 此方法用于分析用户聊天内容
        /// 

        /// 
        public static string Construe（System.Windows.Controls.RichTextBox rtb_TalkMessage ref List str）
        {
            String xml_Content = ““;
            //得到流文档
            FlowDocument document = rtb_TalkMessage.Document;
            //遍历文档顶级节点
            foreach （Block blk in document.Blocks）
            {
                //当前对象是元素
                if （blk is Paragraph）
                {
   

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ..A..H.     59392  2016-04-29 10:44  WinMsgUITest\.vs\WinMsgUITest\v14\.suo

     文件      30208  2016-04-28 14:36  WinMsgUITest\GalaSoft.MvvmLight.dll

     文件       6144  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\Controls.dll

     文件      15872  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\Controls.pdb

     文件    1045504  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\FileIcons.dll

     文件      15872  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\FileIcons.pdb

     文件      30208  2016-04-28 14:36  WinMsgUITest\IM\bin\Debug\GalaSoft.MvvmLight.dll

     文件    1797632  2016-04-29 11:28  WinMsgUITest\IM\bin\Debug\IM.dll

     文件     118272  2016-04-29 11:28  WinMsgUITest\IM\bin\Debug\IM.pdb

     文件     485888  2016-04-28 14:37  WinMsgUITest\IM\bin\Debug\Newtonsoft.Json.dll

     文件     516075  2016-04-28 14:37  WinMsgUITest\IM\bin\Debug\Newtonsoft.Json.xml

     文件      18432  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\Resources.dll

     文件      13824  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\Resources.pdb

     文件      16056  2009-01-11 03:48  WinMsgUITest\IM\bin\Debug\sysface\face.xml

     文件       4096  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\Token.dll

     文件      11776  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\Token.pdb

     文件      20480  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYD.Common.dll

     文件      62976  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYD.Common.pdb

     文件    1791488  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYD.IM.dll

     文件      93696  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYD.IM.pdb

     文件      56320  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYD.Model.dll

     文件     230912  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYD.Model.pdb

     文件       5120  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYDbase.dll

     文件      11776  2016-04-29 09:35  WinMsgUITest\IM\bin\Debug\XYDbase.pdb

     文件       6144  2016-04-29 09:31  WinMsgUITest\IM\bin\Release\Controls.dll

     文件      15872  2016-04-29 09:31  WinMsgUITest\IM\bin\Release\Controls.pdb

     文件    1045504  2016-04-29 09:31  WinMsgUITest\IM\bin\Release\FileIcons.dll

     文件      15872  2016-04-29 09:31  WinMsgUITest\IM\bin\Release\FileIcons.pdb

     文件      30208  2016-04-28 14:36  WinMsgUITest\IM\bin\Release\GalaSoft.MvvmLight.dll

     文件      89600  2016-04-28 14:36  WinMsgUITest\IM\bin\Release\GalaSoft.MvvmLight.pdb

............此处省略588个文件信息