C#删除文件

1:protected void Button1_Click(object sender, EventArgs e)
    {
        string pSavedPath1 = Server.MapPath("http://images.cnblogs.com/ProductImages/6114413/绿.jpg");

        if (File.Exists(pSavedPath1))
        {

            FileInfo fi = new FileInfo(pSavedPath1);

            if (fi.Attributes.ToString().IndexOf("ReadOnly") != -1)

                fi.Attributes = FileAttributes.Normal;

            File.Delete(pSavedPath1);

        }

    }