Writing a file to the browser as an attatchment(asp.net code)

This code shows you how to write a file to the browser as an attatchement which then can be saved by the user

CODE:
string ContentType;
ContentType = "Content-type: text/xml";
Response.ClearContent();
Response.ClearHeaders();
Response.Clear();
Response.Buffer = true;
Response.AddHeader("Content-Disposition", "attachment; filename=username.xml");
Response.Charset = "UTF-8";
Response.ContentType = ContentType;

FileStream outputStream1;
outputStream1 = new FileStream(@"C:filename.xml", FileMode.Open, FileAccess.Read);
MemoryStream ms;
ms = new MemoryStream((int)outputStream1.Length);
BinaryReader br;
br = new BinaryReader(outputStream1);
byte[] bytesRead = br.ReadBytes((int)outputStream1.Length);
ms.Write(bytesRead,0,(int)outputStream1.Length);
Response.OutputStream.Write(ms.ToArray(), 0, (int)ms.Length);
outputStream1.Close();
ms.Close();
br.Close();