C# - Display PDF - Application Page SharePoint?

I am working on a Custom WebPart, for which I need an application page to render a PDF file.

I am currently using following link [URL]

It works fine in ASP.NET, but gives a blank page in SharePoint.

Here's the code:

(PDF file is in same directory)
Response.ClearContent();
Response.ClearHeaders();
//Set the appropriate ContentType.
Response.ContentType = "Application/pdf";
//Get the physical path to the file.
string FilePath = MapPath("Test.pdf");
//Write the file directly to the HTTP content output stream.
Response.WriteFile(FilePath);
Response.Flush();
Response.End();