Showing a list of objects in asp.net mvc

I can think of two options:

Use the ViewData dictionary to store the articles.

public ActionResult ProfileView(int id)
{

Profile profile = profileRepository.GetProfileByID(id);  
var articles = articlesRepository.FindArticlesByUserID(id).ToList();
ViewData["Articles"] = articles;
return View("ProfileView", profile);
}

Or, if you want to avoid using ViewData, create a ViewModel. A ViewModel is kind of a data transport object. You could create a ProfileViewModel class like this:

public class ProfileViewModel
{
     public Profile Profile{ get; set; }
     public IList<Article> Articles { get; set; }
}

or just include the Profile properties you are using in your view, this will make binding easier but you'll have to copy values from your Model to your ViewModel in your controller.:

public class ProfileViewModel
{
     public int Id{ get; set; }
     public string Name { get; set; }
     .......
     public IList<Article> Articles { get; set; }
}

If you go for this last option take a look at AutoMapper (an object to object mapper).