How to download a file from System?

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ASP.NET

C#3.5

Hiii

This is Krishna.I have A dought to Clarify.My Question is

I have Upload A file To Folder in The System How Can download the folder from System can any one having Code Please Forward me my mail id.

if (drpexperience.SelectedItem.ToString() == "Experience")
       {
           if (drpExperiencetype.SelectedItem.ToString() == "1year")
           {
               if (drpjobtype.SelectedItem.ToString() == "IT")
               {
                   filename = Path.GetFileName(fileUpload1.PostedFile.FileName);
                   fileUpload1.SaveAs(@"D:\Resume\Experience\1YearExperience\IT\" + fileUpload1.FileName);

                   Response.Write("File uploaded sucessfully.");
                   lblFilename.Text =@"D:\Resume\Experience\1YearExperience\IT\" + fileUpload1.FileName;
               }
           }

By using These I upload File to System But How can I downlaod if any one found Code please Forward

thanks&Regards
krishnaprasad