Linqpad script to quickly parse trello story map board

ParseTrelloExport.linq

<Query Kind="Program">
  <Reference>&lt;RuntimeDirectory&gt;\System.Collections.dll</Reference>
  <Reference>&lt;RuntimeDirectory&gt;\System.Linq.dll</Reference>
  <NuGetReference>Newtonsoft.Json</NuGetReference>
  <Namespace>Newtonsoft.Json</Namespace>
  <Namespace>Newtonsoft.Json.Bson</Namespace>
  <Namespace>Newtonsoft.Json.Converters</Namespace>
  <Namespace>Newtonsoft.Json.Linq</Namespace>
  <Namespace>Newtonsoft.Json.Schema</Namespace>
  <Namespace>Newtonsoft.Json.Serialization</Namespace>
</Query>

void Main()
{
    var content = File.ReadAllText(@"c:\users\robert\desktop\export-from-trello.json");
	var parsed = JsonConvert.DeserializeObject<TrelloBoard>(content);
	
	var regex = new Regex(@"\(((.+?)\) )?(.+)");
		
	var joined = parsed.cards
		.Where(c => !c.closed)
		.Join(parsed.lists, c => c.idList, l => l.id, (c, l) => new {List = l.name, Story = c.name, StoryId = c.id})
		.GroupJoin(parsed.checklists, c => c.StoryId, cl => cl.idCard, (c, cl) =>
			new {
				List = c.List,
				Story = c.Story,
				Assumptions = string.Join(", ",
					(cl.SingleOrDefault(l => l.name == "Assumptions") ?? new TrelloChecklist(){checkItems = Enumerable.Empty<TrelloCheckListItem>()})
					.checkItems.Select(i => i.name)
				)
			}
		)
		.Select(
			c => new {c.List, Story = regex.Match(c.Story).Groups[3].Value, Estimate = regex.Match(c.Story).Groups[2].Value, c.Assumptions}
		);
	joined.Dump();
}

public class TrelloBoard {
	public IEnumerable<TrelloList> lists { get; set; }
	public IEnumerable<TrelloCard> cards { get; set; }
	public IEnumerable<TrelloChecklist> checklists { get; set; }
}
public class TrelloList {
	public string id { get; set; }
	public string name { get; set; }
}
public class TrelloCard {
	public string id { get; set; }
	public string name { get; set; }
	public string idList { get; set; }
	public bool closed { get; set; }
}
public class TrelloChecklist {
	public string name { get; set; }
	public string idCard { get; set; }
	public IEnumerable<TrelloCheckListItem> checkItems { get; set; }
}
public class TrelloCheckListItem {
	public string name { get; set; }
}


// Define other methods and classes here