File upload direct on server folder and sub folder

Folder direct on server

FileUpload1.SaveAs(Server.MapPath("~") + "//maildata//" + FileUpload1.FileName);




Folder inside sub folder 

 FileUpload1.SaveAs(Server.MapPath(@"~/Admin/") + "//impact//" + FileUpload1.FileName);


  Label1.Text = FileUpload1.FileName;