How to assign image present in "images" folder of my asp.net website to HttpPostedFile?
HttpPostedFile is simply used by the ASP.NET FileUpload control by uploaded files only.
You can't assign a file to this class nor can you inherit from this class since it's sealed.
What you can do though, is create a similar class that has the following properties/functions:
public void SaveAs(string filename);
public string FileName { get; set; }
public string ContentType { get; set; }
public int ContentLength { get; set; }
public Stream InputStream { get; set; }