Repeater - Paging In C# Without A Database?

I have a page on my ASP.NET site that has a Repeater control to show posts from members of the site.

At the moment I am storing the data for the posts in an XML file and then caching it within the site inside custom objects.

So I have:

public class MemberPost
{
public string Title { get; set; }
public string Text { get; set; }
public string Name { get; set; }
public DateTime Date { get; set; }
public List<string> Pictures { get; set; }
}

And:

public class MemberPosts : List<MemberPost>
{
}

I'm able to set the data source of the repeater to an instance of MemberPosts and it all works as expected, but I want to add paging for when more posts are added.

All the examples I find seem to involve having the data to be paged in a database - is there any way I can bind the repeater or another similar control to my in-memory MemberPosts collection and have it implement paging for me?