Issue-

You might have faced issue converting string with dot notation to JSON Asp.Net. Have a look at this image

So as in the image you can see we have dot separated hierarchy which we have to convert in json. So we will have a look at how to do that in c#.

Step-1

So we will start by creating  a class for our hierarchical data

public class Treepath
    {
        public string Key { get; set; }
        public Treepath children { get; set; }

    }

List<Treepath> trees = new List<Treepath>();
            foreach (var path in treepath)
            {
                var item = new Treepath();
                var sublevel = path.Split(".");
                for (int i = 0; i < 1; i++)
                {
                    var lastitem = new Treepath();
                    for (int j = sublevel.Count()-1; j > 0; j--)
                    {
                        if (sublevel[j] == sublevel.LastOrDefault())
                        {
                            lastitem.children = new Treepath { Key = sublevel[j], children = null };
                        }
                        else
                        {
                            lastitem.children = new Treepath { Key = sublevel[j], children =  lastitem.children  };
                        }
                    }
                    lastitem.Key = sublevel[i];
                    item = lastitem;
                }
                trees.Add(item);
            }
            var json = JsonConvert.SerializeObject(trees);