Generate HTTpResponse message from FileStream in .Net4.0 .

Question

 Hi All

I have used the following code to generate HTMLResponseMessage in WCF Rest Service with .Net 4.5 . But I need to generate the same in .Net 4.0 version. I could not able to find the solution.

Can any one help me on this 

 

public static HttpResponseMessage GetFile()

{

string file=@"C:/test.docx"; 

var rv = new HttpResponseMessage(HttpStatusCode.OK);

var stream = new FileStream(file, FileMode.Open, FileAccess.Read);

rv.Content = new StreamContent(stream);

rv.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

return rv;

}

 

Thanks in advance