Illegal characters in path.  --  runtime error

protected void AJAXUploader1_FileUploaded1(object sender, EventArgs e)
        {
            EO.Web.AJAXPostedFile[] files = AJAXUploader1.PostedFiles;
 
            string s = string.Empty;
 
            foreach (EO.Web.AJAXPostedFile file in files)
            {
                s += System.IO.Path.GetFileName(file.TempFileName);
                s += "<br />";
            }
 
            lblFiles.Text = s;
 
            //string path1 = @"D:\Inetpub\docs\Upload\" + s.Trim();
            //string path2 = @"D:\Inetpub\docs\UploadDestination\" + s.Trim();
 
            string path1 = @"D:\Inetpub\docs\Upload\" + s;
            string path2 = @"D:\Inetpub\docs\UploadDestination\" + s;
 
            if (!File.Exists(path1))
            {
                using (FileStream fs = File.Create(path1)) { }
            }
 
            if (File.Exists(path2))
                File.Delete(path2);
 
            File.Move(path1, path2);  
        }