Web Forms :: Export To PDF Format Is Not Working

I was trying to export asp.net content to PDF format by setting the content type to "PDF" using following sample code.

MemoryStream theStream= new MemoryStream();
theStream.Write(Encoding.UTF8.GetBytes("Srikanth"),0,"Export to PDF".Length);
byte[] byteArr = (byte[])Array.CreateInstance(typeof(byte), theStream.Length);
theStream.Position = 0;
theStream.Read(byteArr, 0, (int)theStream.Length);
theStream.Close();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=ExportedTo.pdf");
Response.OutputStream.Write(byteArr,0,byteArr.Length);
Response.End();

On opening this PDF attachment i am gettng an error message.

Adobe Reader could not open 'ExportedTo[1].pdf' because it is either not a supported file type or because this file has been damaged(for example, it was sent as an email attachment and wasn't correctly decoded).

Is it that with this approach we can't export asp.net content into PDF. Do i have to use any 3rd party component to export the content into PDF format.