using System;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using Newtonsoft.Json;

using Newtonsoft.Json.Serialization;

​

​

public class Program

{

    public static void Main()

    {

        var users = new List<UserDTO>

        {

            new UserDTO { Id = 1, Name = "Joe Schmoe" },

            new UserDTO { Id = 2, Name = "John Doe" },

            new UserDTO { Id = 3, Name = "Bob Smith" }

        };

        PagedData<UserDTO> data1 = new PagedData<UserDTO>(users, 3, 1, 0, 10);

        JsonSerializerSettings settings = new JsonSerializerSettings

        {

            ContractResolver = new CustomResolver(),

            Formatting = Formatting.Indented

        };

        string json = JsonConvert.SerializeObject(data1, settings);

        Console.WriteLine(json);

        Console.WriteLine(new string('-', 40));

        var items = new List<ItemDTO>

        {

            new ItemDTO { Id = 1, Name = "Hammer" },

            new ItemDTO { Id = 2, Name = "Saw" },

            new ItemDTO { Id = 3, Name = "Drill" },

            new ItemDTO { Id = 4, Name = "Wrench" },

        };

        PagedData<ItemDTO> data2 = new PagedData<ItemDTO>(items, 4, 1, 0, 10);

        json = JsonConvert.SerializeObject(data2, settings);

        Console.WriteLine(json);

        Console.WriteLine(new string('-', 40));

​

        var berries = new List<Berry>

        {

            new Berry { Name = "Strawberry" },

            new Berry { Name = "Blueberry" },

            new Berry { Name = "Raspberry" },

            new Berry { Name = "Blackberry" },

        };

        PagedData<Berry> data3 = new PagedData<Berry>(berries, 4, 1, 0, 10);

        json = JsonConvert.SerializeObject(data3, settings);

        Console.WriteLine(json);

    }

}

​

​

public class JsonPropertyNameBasedOnItemClassAttribute : Attribute

{

}

​

public class JsonPluralNameAttribute : Attribute

{

    public string PluralName { get; set; }

    public JsonPluralNameAttribute(string pluralName)

    {

        PluralName = pluralName;

    }

}

​

public class CustomResolver : DefaultContractResolver

{

    protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)

    {

        JsonProperty prop = base.CreateProperty(member, memberSerialization);

        if (prop.PropertyType.IsGenericType && member.GetCustomAttribute<JsonPropertyNameBasedOnItemClassAttribute>() != null)

        {

            Type itemType = prop.PropertyType.GetGenericArguments().First();

            JsonPluralNameAttribute att = itemType.GetCustomAttribute<JsonPluralNameAttribute>();

            prop.PropertyName = att != null ? att.PluralName : Pluralize(itemType.Name);

        }

        return prop;

    }

    protected string Pluralize(string name)

    {

        if (name.EndsWith("y") && !name.EndsWith("ay") && !name.EndsWith("ey") && !name.EndsWith("oy") && !name.EndsWith("uy"))

            return name.Substring(0, name.Length - 1) + "ies";

        if (name.EndsWith("s"))

            return name + "es";

        return name + "s";

    }

}

​

​

public class PagedData<T>

{

    public PagedData(IEnumerable<T> data, int count, int currentPage, int offset, int rowsPerPage, int? previousPage = null, int? nextPage = null)

    {

        Data = data;

        Count = count;

        CurrentPage = currentPage;

        Offset = offset;

        RowsPerPage = rowsPerPage;

        PreviousPage = previousPage;

        NextPage = nextPage;

    }

    [JsonPropertyNameBasedOnItemClass]

    public IEnumerable<T> Data { get; private set; }

    public int Count { get; private set; }

    public int CurrentPage { get; private set; }

    public int Offset { get; private set; }

    public int RowsPerPage { get; private set; }

    public int? PreviousPage { get; private set; }

    public int? NextPage { get; private set; }

}

​

[JsonPluralName("Users")]

public class UserDTO

{

    public int Id { get; set; }

    public string Name { get; set; }

}

​

[JsonPluralName("Items")]

public class ItemDTO

{

    public int Id { get; set; }

    public string Name { get; set; }

}

​

public class Berry

{

    public string Name { get; set; }    

}

​