Selection bug for listbox where the list items are value types / structs and contain duplicates?

Question

I turned an Horizontal ItemsControl to a Listbox so that I am able to select individual items but found that the selection was broken. Took some time to distill out the prob

Answer 1

Why not simply use a better collection class as your datasource to overcome the problem

var collection = new[]
 {
     new Book {Id = 1, Name = "Book1"},
     new Book {Id = 2, Name = "Book2"},
     new Book {Id = 3, Name = "Book3"},
     new Book {Id = 4, Name = "Book4"},
     new Book {Id = 3, Name = "Book3"},
 };
 var Books = collection.ToDictionary(b => Guid.NewGuid(), b => b);
 DataContext = Books;

And this will be your DataTemplate