#nullable enable

using System;

using System.Threading.Tasks;

using System.Collections.Generic;

​

var user = new User();

var userClient = new UserClient();

​

var tweet = await userClient.Timelines.GetUserTimelineAsync(user); 

​

for (int i = 0; i <2; i++)

{

    WriteNullable("Coordinates", t => t.Coordinates);

    WriteNullable("Contributors", t => t.Contributors);

    WriteNullable("ExtendedTweet", t => t.ExtendedTweet);

    WriteNullable("FilterLevel", t => t.FilterLevel);

    WriteNullable("WithheldInCountries", t => t.WithheldInCountries);

    WriteNullable("ContributorsIds", t => t.ContributorsIds);

    Console.WriteLine(tweet[i].CreatedAt);

    Console.WriteLine(tweet[i].CreatedBy);

    Console.WriteLine(tweet[i].DisplayTextRange);

    Console.WriteLine(tweet[i].Entities);

    Console.WriteLine(tweet[i].FavoriteCount);

    Console.WriteLine(tweet[i].Favorited);

    Console.WriteLine(tweet[i].FullText);

    Console.WriteLine(tweet[i].Text);

​

    void WriteNullable(string name, Func<Tweet, object?> propertySelector)

    {

        var property = propertySelector(tweet[i]);

        if(property is null)

            Console.WriteLine($"no {name}");

        else

            Console.WriteLine(property);

    }

}

​

public class UserClient

{

    public Timelines Timelines { get; set; } = new Timelines();

}

​

public class Timelines

{

    public Task<IReadOnlyList<Tweet>> GetUserTimelineAsync(User user)

    {

        IReadOnlyList<Tweet> result = new[]

        {

            new Tweet() { Coordinates = "Coordinates", FilterLevel="FilterLevel" },

            new Tweet() { ExtendedTweet = "ExtendedTweet", Coordinates = "Coordinates" }

        };

        return Task.FromResult(result);

    }

}

​

public class User {}

​

public class Tweet

{

    public object? Coordinates { get; set; }

    public object? Contributors { get; set; }

    public object? ExtendedTweet { get; set; }

    public object? FilterLevel { get; set; }

    public object? WithheldInCountries { get; set; }

    public object? ContributorsIds { get; set; }

​

    public object CreatedAt { get; set; } = "CreatedAt";

    public object CreatedBy { get; set; } = "CreatedBy";

    public object DisplayTextRange { get; set; } = "DisplayTextRange";

    public object Entities { get; set; } = "Entities";

    public object FavoriteCount { get; set; } = "FavoriteCount";

    public object Favorited { get; set; } = "Favorited";

    public object FullText { get; set; } = "FullText";

    public object Text { get; set; } = "Text";

}