Windows Media Player 浏览按钮问题

生成报告axMediaPlayer并不包含GetMediaInfoString的定义
axMediaPlayer并不包含MpMediaInfoType的定义
下面是浏览按钮代码,错误用红色标注,请帮忙分析下如何改正,谢谢!private void button1_Click(object sender, EventArgs e)
        {
            
                        if(this.openFileDialog1.ShowDialog()==DialogResult.OK)
           {
              
                this.listView1.Items.Clear();
                string[] FileNames = this.openFileDialog1.FileNames;
                foreach (string FileName in FileNames)
                {
                    FileInfo MyFileInfo = new FileInfo(FileName);
                   float MyFileSize = (float)MyFileInfo.Length / (1024 * 1024);
                    this.axWindowsMediaPlayer1.Name = FileName;
                    string MyAuthor = this.axWindowsMediaPlayer1.GetMediaInfoString(axWindowsMediaPlayer1.MpMediaInfoType.mpClipAuthor);
                    string MyShortFileName = FileName.Substring(FileName.LastIndexOf("\\") + 1);
                   MyShortFileName = MyShortFileName.Substring(0, MyShortFileName.Length - 4);
                   string[] SubItem ={ MyShortFileName, MyAuthor, MyFileSize.ToString().Substring(0, 4) + "M", FileName };
                   ListViewItem Item = new ListViewItem(SubItem);
                    this.listView1.Items.Add(Item);
                    this.listView1.Items[0].Selected = true;
                }
          }
        }