This post shows how it’s possible to create your own .NET class and then use this within your orchestration (as a variable) to work with typed lists - something that unfortunately isn’t supported out of the box in BizTalk orchestrations. Below is the class used to create a typed list for System.String objects.
using System;
using System.Collections.Generic;
using System.Text;
namespace Sample.BizTalkCollections
{
[…]