I am using LINQ to query a generic dictionary and then use the result as the datasource for my ListView.

Dictionary<Guid, Record> dict = GetAllRecords();

List<Record> searchResults = new List<Record>();

var matches = dict.Values.Where(rec => rec.Name == "foo");

foreach (Record rec in matches)

    searchResults.Add(rec);

myListView.DataSource = searchResults;

myListView.DataBind();