Response.Flush() method is not working - asp.net

Question

Response.Flush method is not working. I am getting the data at pdfContent but it is not opening the PDF documnet. Below is the code. Please help.
public ActionResult PdfClick(int requestid)
{
BusinessRequestController bsnrqstcntrlr = new BusinessRequestController();
try
{
int DocId = (new BusinessRequestBR()).GetBaseLineDocumentsForSearch(requestid);
byte[] PdfContent = (new BusinessRequestHelper()).GetBaseLineDonload(DocId);
Response.Buffer = true;
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment; filename=" + "BaseLine_Doc" + "_" + DocId + ".pdf");
Response.BinaryWrite(PdfContent);
Response.Flush();
return Content("");
}
catch (Exception ex)
{
throw this.log.CreatePropagatedException(ex);
}

Answer 1

Instead of using
return Content("")
use this:
return File(
PdfContent,
"application/pdf",
string.Format("BaseLine_Doc{0}.pdf", DocId)
)
There is no need to manipulate the response. Just return the correct result type.

Answer 2

Pulling out code from my running project
Response.Clear();
Response.AddHeader("Content-Disposition","attachment; filename=\"" + file[0].Name + "\"");
Response.AddHeader("Content-Length", fileSize.ToString(_culture));
Response.ContentType = Path.GetExtension(file[0].Name).GetMimeType();
Response.BufferOutput = false;
Response.AddHeader("Accept-Ranges", "bytes"); //tell the client that we accept byte-range requests
while (totalBytesRead < fileSize)
{
if (!Response.IsClientConnected)
{
System.Diagnostics.Debug.WriteLine("--> Client disconnected");
break;
}
int bytesRead = fs.Read(buffer, 0, buffer.Length);
Response.OutputStream.Write(buffer, 0, bytesRead);
Response.Flush();
totalBytesRead += bytesRead;
}
Response.End();
This code works for me every time, please manipulate according to your need.
Note: Variables are defined above the code.