using System;

using System.Collections.Generic;

using System.Text.Json;

using System.Text.Json.Serialization;

​

public class Program

{

    public static void Main()

    {

        var document = new Document

        {

            DocumentName = "what?",

            Extension = "pdf"

        };

        var listDocs = new List<Document>();

        listDocs.Add(document);

        var serialized = JsonSerializer.Serialize(listDocs);

        Console.WriteLine("Serialize");

        Console.WriteLine(serialized);

        Console.WriteLine("");

        Console.WriteLine("Deserialize");

        var deserialized = JsonSerializer.Deserialize<List<Document>>(serialized);

        Console.WriteLine(deserialized[0].DocumentName);

    }

}

​

public class Document

{

    [JsonPropertyName("docname")]

    public string DocumentName { get; set; }

    public string doclocation { get; set; }

    public string division { get; set; }

    public string inputsourcetype { get; set; }

​

    [JsonPropertyName("docextension")]

    public string Extension { get; set; }

    public float filesizekb { get; set; }

    public int pagecount { get; set; }

    public string foreignsys { get; set; }

    public string foreignsysid { get; set; }

}