Some examples of how we can use the placement information embedded in tiles. Each tile also has a 'Dungeon' property which has even more connectivity information including: lists for main path, branch path, and all tiles; as well as a list of all connections between tiles.

ConnectivityFunctions.cs

using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using DunGen;

public static class ConnectivityFunctions
{
	public static void GetPreviousAndNextTiles(Tile tile, out Tile previousTile, out Tile nextTile)
	{
		previousTile = null;
		nextTile = null;

		// NormalizedDepth gives us a value between 0-1 for how deep the tile is
		// this is the distance along the main path if the tile is on the main path,
		// or the distance along its branch otherwise
		float currentTileDepth = tile.Placement.NormalizedDepth;

		foreach(var doorway in tile.UsedDoorways)
		{
			var neighbour = doorway.ConnectedDoorway.Tile;

			float neighbourTileDepth = neighbour.Placement.NormalizedDepth;

			if (neighbourTileDepth < currentTileDepth)
				previousTile = neighbour;
			else if (neighbourTileDepth > currentTileDepth)
				nextTile = neighbour;
		}
	}

	public static IEnumerable<Tile> GetAdjacentTiles(Tile tile)
	{
		var neighbours = new List<Tile>();

		// We can get this tile's neighbours by looking at all
		// of the used doorways
		foreach (var doorway in tile.UsedDoorways)
			neighbours.Add(doorway.ConnectedDoorway.Tile);

		return neighbours;
	}
}