Downloading binary data attachments in Internet Explorer

Question

Hi,

 I need small help from you guys! I am implementing a  project where I need to meet the following requirement.

 

I am receiving base 64 data from an API which is the attachments data of an email (Attachments may be images, pdf's, html files, documents etc.,), now I want to download them using IE as my browser. I have tried using blob data but that is not acceptable by Internet Explorer because of security reasons. so now I thought of constructing back the attachment using C# and saving it in the server where I have deployed my application so that it will be a trusted source where I can download it using anchor tag.

 

I have searched so many blogs and posts but not able to get the code can you please help me out?