Opening word in asp.net application

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C#

C#4.0

ASP.NET4

Hi All,

i am opening the word doc document from server to client side, if i download the word multiple time from a .aspx page. 4-5 times word download correctly but after
some iteration i am trying to downloading the word doc, then instead of opening the word at client window it shows my doc as an html form.
what should i do to resolve this issue?

evety time i am clearing the content by

Response.ClearHeaders();
 Response.ClearContent();

but it show my document as an html page.