How to store tile data for placing tiles

Often times when you want to model storing data in an object-oriented program, a good path to take is making a class! I'd recommend making a TileType class that has all the data about a tile type. You can reference this type from your tile object to populate various properties. If you structure things this way, you can also load all your tile types from a file. Here's a really simple example, where the data would come from a json file. For more on how to read JSON, see this article:

Code Files

 [Serializable]
 public class TileType
 {
     public int id;
     public string name;
     public double hardness;
 
     public static TileType CreateFromJSON(string jsonString)
     {
         return JsonUtility.FromJson<TileType>(jsonString);
     }
 }
 
 public class TileTypeLoader
 {
     public IEnumerable<TileType> LoadTileTypes()
     {
         var tileTypes = new List<TileType>();
         var tileTypeStrings = File.ReadAllLines("C:/path/to/tile/type/file.json");
         foreach(var tileTypeString in tileTypeStrings)
         {
             var tileType = TileType.CreateFromJSON(tileTypeString);
             tileTypes.Add(tileType);
         }
 
         return tileTypes;
     }
 }

A JSON File

 {"id": 1, "name": "Dirt", "hardness": 1}
 {"id": 2, "name": "Stone", "hardness": 2.5}
 {"id": 3, "name": "Grass", "hardness": 1.5}