在项目我想将Gridview.Columns暂存在ViewState中，然后再将ViewState的值转换回DataControlFieldCollection，可出现“ Type 'System.Web.UI.WebControls.DataControlFieldCollection' in Assembly 'System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable.“的错误，我想应该是DataControlFieldCollection没序列化不能转换吧。请问怎样才能解决这个问题。代码如下：

    protected void Button1_Click(object sender, EventArgs e)
        {
            ViewState["GridViewColumns"] = GridView1.Columns;
            DataControlFieldCollection collection =(DataControlFieldCollection) ViewState["GridViewColumns"];//出错
        }