Wrapper for reading and writing classes to and from disk (using Newtonsoft.Json.dll)

JsonWrangler.cs

using System.Collections.Generic;
using System.IO;
using Newtonsoft.Json;

namespace JsonPersistenceExample
{
	public static class JsonWrangler
	{
		public static void WriteJsonItem<T>(T item, FileInfo outputFile)
		{
			var serialiser = new JsonSerializer();
			using (var sw = new StreamWriter(outputFile.FullName))
			{
				using (var writer = new JsonTextWriter(sw))
				{
					writer.Formatting = Formatting.Indented;
					serialiser.Serialize(writer, item);
				}
			}
		}

		public static void WriteJsonList<T>(List<T> listOfObjects, FileInfo outputFile)
		{
			var serialiser = new JsonSerializer();
			using (var sw = new StreamWriter(outputFile.FullName))
			{
				using (var writer = new JsonTextWriter(sw))
				{
					writer.Formatting = Formatting.Indented;
					serialiser.Serialize(writer, listOfObjects);
				}
			}
		}

		public static T ReadJsonItem<T>(FileInfo file)
		{
			var deserialiser = new JsonSerializer();

			var reader = new JsonTextReader(new StreamReader(file.FullName));
			return deserialiser.Deserialize<T>(reader);
		}

		public static List<T> ReadJson<T>(FileInfo file)
		{
			var deserialiser = new JsonSerializer();

			var reader = new JsonTextReader(new StreamReader(file.FullName));
			return deserialiser.Deserialize<List<T>>(reader);
		}
	}
}

If you need to persist classes to disk, and read them again later (in configuration files for example), use the above code in a class, and call it like so:

Write to the config file:

var config = new ConfigurationEntity() { Value1 = "val1", Value2 = "val2" };
JsonWrangler.WriteJsonItem(config, new FileInfo("config.json"));

Read from the config file:

var config = JsonWrangler.ReadJsonItem<ConfigurationEntity>(new FileInfo("config.json"));

Lists and more ...

Write a generic List<T>:

var entityList = new List<T>() { new T { Value1 = "val1", Value2 = "val2" }, new T { Value1 = "val3", Value2 = "val4" } };
JsonWrangler.WriteJsonList(entityList, new FileInfo("list.json"));

Read the generic List<T> back again:

var entityList = JsonWrangler.ReadJson<T>(new FileInfo("list.json"));