}
完整的代码如下：

using System;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Serialization;

using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.WebPartPages;
using System.IO;

namespace MyWebPart
{
    [Guid("9a7ee2e6-ebff-4594-a3e3-d59aceae4e45")]
    public class MyWebPart : System.Web.UI.WebControls.WebParts.WebPart
    {
        public MyWebPart()
        {
            this.ExportMode = WebPartExportMode.All;
        }

        protected override void Render(HtmlTextWriter writer)
        {
            this.EnsureChildControls();
            this._innerControl.RenderControl(writer);
        }
        private System.Web.UI.Control _innerControl;
        protected override void CreateChildControls()
        {
            using (StreamReader reader = new StreamReader(System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream("SampleWebPart.WebUserControl1.ascx")))
            {
                String resourceContent = reader.ReadToEnd();
                using (StreamWriter writer = new StreamWriter(this.Page.Server.MapPath("/bin/MyWebUserControl.ascx"), false))
                {
                    writer.Write(resourceContent);
                }
            }
            this._innerControl = this.Page.LoadControl("/bin/MyWebUserControl.ascx");
            this.Controls.Add(this._innerControl);
        }
    }
}

注意：