The last modifications of this post were around 2 years ago, some information may be outdated!
Summary
Quickly parse that JSON list into a stongly typed list object for use.
Note
Duck
object used here is assumed to be defined elsewhere in code. Code assumed JSON is structured properly for object.
Code
using System.Collections.Generic;
using System.IO;
using Newtonsoft.Json;
var pathToSeedData = Path.Combine(Directory.GetCurrentDirectory(), "Data", "duck_seed.json");
var dataSet = File.ReadAllText(pathToSeedData);
var seedData = JsonConvert.DeserializeObject<List<Duck>>(dataSet);