problem with the downloading file class

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ASP.NET4

hello.

I have made a class for the Download statement as below, but when download completes the downloaded file is not working and is corrupted, what is the problem in this class?

public class DownLoad
{
    public static void FileDownLoad(string URL)
    {
        WebClient Request = new WebClient();
        HttpResponse Response = HttpContext.Current.Response;
        Response.Clear();
        Response.ClearContent();
        Response.ClearHeaders();
        Response.Buffer = true;
        Response.AddHeader("Content-Disposition", "attachment;filename=\"" +URL +"\"");
        byte[] data = Request.DownloadData(URL);
        Response.BinaryWrite(data);
        Response.End();
    }
}