linq- This sample shows how to efficiently join elements of two sequences based on equality between key expressions over the two.

    Dim categories() As String = {"Beverages", "Condiments", "Vegetables", "Dairy Products", "Seafood"}

    Dim products = GetProductList()

    Dim categorizedProducts = From cat In categories _
                              Join prod In products On cat Equals prod.Category _
                              Select Category = cat, prod.ProductName

    For Each v In categorizedProducts
        Console.WriteLine(v.ProductName & ": " & v.Category)
    Next