string fullname="D:\Program Files (x86)\西安羚羊网络科技有限公司\羚羊门窗产销系统\Pic\001.jpg"
Process pro = Process.Start(@"C:\WINDOWS\system32\mspaint.exe", fullname);
弹出错误 “无法打开Program.png”
错误原因：图片路径中存在空格“Program Files (x86)”
解决方法：
Process pro = Process.Start(@"C:\WINDOWS\system32\mspaint.exe", "\"" + fullname + "\"");