SampleData.cs

using System;
using System.Collections.Generic;
using System.Xml.Serialization;

namespace FredAPI
{
    public class SampleData
    {
		// Root myDeserializedClass = JsonConvert.DeserializeObject<Root>(myJsonResponse); 
		public class Observation
		{
			public string realtime_start { get; set; }
			public string realtime_end { get; set; }
			public string date { get; set; }
			public string value { get; set; }
		}

		public class Root
		{
			public string realtime_start { get; set; }
			public string realtime_end { get; set; }
			public string observation_start { get; set; }
			public string observation_end { get; set; }
			public string units { get; set; }
			public int output_type { get; set; }
			public string file_type { get; set; }
			public string order_by { get; set; }
			public string sort_order { get; set; }
			public int count { get; set; }
			public int offset { get; set; }
			public int limit { get; set; }
			public List<Observation> observations { get; set; }
		}
	}
}