<Query Kind="Program">
  <NuGetReference>Jil</NuGetReference>
  <Namespace>Jil</Namespace>
  <Namespace>System.Runtime.Serialization</Namespace>
</Query>

void Main()
{
	var objs = new List<MyBaseClass>();
	objs.Add(new MySubClass(new [] { "foo", "bar", 3.0f.ToString() }));
	objs.Add(new MySubClass(new [] { "foo", "bar", 3.0f.ToString() }));
	objs.Add(new MySubClass(new [] { "foo", "bar", 3.0f.ToString() }));

	using (var output = new StringWriter())
	{
		JSON.Serialize(
		   objs,
			output,
			Options.ISO8601IncludeInherited
		);
		output.ToString().Dump(); // this prints [{},{},{}]
	}
}

// Define other methods and classes here
public class MyBaseClass
{
	[DataMember]
	string FileName { get; set; }
	[DataMember]
	string FileCreationTime { get; set; }
	public MyBaseClass(string[] rawRecord)
	{
		this.FileName = rawRecord[0];
		this.FileCreationTime = rawRecord[1];
	}
}

public class MySubClass : MyBaseClass
{
	[DataMember]
	float X;
	public MySubClass(string[] rawRecord) : base(rawRecord)
	{
		this.X = float.Parse(rawRecord[2]);
	}
}