How to create download option in api with csharp

public virtual JPResponse GetResumeByApplicationID(INeo neo, string applicationID)

{

var response = new JPResponse();

try

{

MXResumeWordDoc resumeWordDoc = new MXResumeWordDoc();

var IsResumeLoaded = resumeWordDoc.LoadResumeWordDocByDID(neo as Neo, applicationID);

if (IsResumeLoaded)

{

string fileExtension = System.IO.Path.GetExtension(resumeWordDoc.Elements.FileName.Value).ToLower();

if (resumeWordDoc.Elements.FileName != null)

{

//if the above condition satisfy i want to create a download option here.

How can I do it??

}

response.Results.Add(IsResumeLoaded.ToString());

}

catch (Exception ex)

{

neo.SendInformationalMXM("ResumeService", ex.Message, ex, this, "ResumeService.GetResume");

throw ex;

}

return response;

}