C#调用系统注册程序打开pdf文件

 1 private void btn_帮助文档_ItemClick(object sender, ItemClickEventArgs e)
 2 {
 3     try
 4     {
 5         System.Diagnostics.Process.Start(@"..\help\软件系统帮助文档.pdf"); 
 6     }
 7     catch(Exception ex)
 8     {
 9         MessageBox.Show(ex.Message);
10     }
11 }