hi iam getting error in file uploading in asp.net

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ASP.NET

code behind ...........

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class fileupload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void btnsave_Click(object sender, EventArgs e)
    StringBuilder sb = new StringBuilder();
   if (FileUpload1.HasFile)
   {
      try
      {
      sb.AppendFormat(" Uploading file: {0}",
                                  FileUpload1.FileName);
      //saving the file
      FileUpload1.SaveAs("<c:\\SaveDirectory>" +
                                  FileUpload1.FileName);
      //Showing the file information
      sb.AppendFormat("<br/> Save As: {0}",
                         FileUpload1.PostedFile.FileName);
      sb.AppendFormat("<br/> File type: {0}",
                         FileUpload1.PostedFile.ContentType);
      sb.AppendFormat("<br/> File length: {0}",
                         FileUpload1.PostedFile.ContentLength);
      sb.AppendFormat("<br/> File name: {0}",
                         FileUpload1.PostedFile.FileName);
      }
      catch (Exception ex)
      {
      sb.Append("<br/> Error <br/>");
      sb.AppendFormat("Unable to save file <br/> {0}",
                         ex.Message);
      }

   else
   {
      lblmessage.Text = sb.ToString();
   }
}

error is


Error 3 ; expected E:\mine\WebSite19\fileupload.aspx.cs 17 61 WebSite19
Error 18 A namespace does not directly contain members such as fields or methods E:\mine\WebSite19\fileupload.aspx.cs 38 7 WebSite19
Error 6 Invalid token '(' in class, struct, or interface member declaration E:\mine\WebSite19\fileupload.aspx.cs 23 22 WebSite19


Error 19 Type or namespace definition, or end-of-file expected E:\mine\WebSite19\fileupload.aspx.cs 49 1 WebSite19