MVC PDF Generation Issue (Urgent)

Hi all

In mvc application using bellow code i am trying to generate PDF file. The issue is i am not able to generate PDF file , instead of PDF file i am geting bellow response please check.

code :-

Response.Clear();

Response.ClearContent();

Response.ClearHeaders();

Response.AddHeader("content-disposition", "attachment; filename=" + docName);

Response.ContentType = "octet-stream";

Byte[] FileBuffer = here byte array (file content)

Response.BinaryWrite(FileBuffer);

Output as of now

Thanks In Advance

Madan