FIle upload in ASP .NET

3. File upload:

Code for upload button:

 protected void Btnupload_Click(object sender, EventArgs e)
    {
        int sizelimit = 5242880;
        if (FileUpload1.HasFile)
        {
            if (FileUpload1.PostedFile.ContentLength <= sizelimit)
            {
                string path = "c:\\upload\\" + FileUpload1.FileName;
                FileUpload1.SaveAs(path);
                Label1.Text = "file uploaded to " + path;
            }
            else
                Label1.Text = "file exceeds size limit.";
        }
    }