use endpoints in csharp

main.cs
using System;
using System.Net.Http;
using System.Threading.Tasks;

public class Program
{
    private const string BASE_URL = "https://jsonplaceholder.typicode.com/";

    public static async Task Main(string[] args)
    {
        using var client = new HttpClient();
        client.BaseAddress = new Uri(BASE_URL);
        
        // Get a list of all users
        HttpResponseMessage response = await client.GetAsync("users");
        response.EnsureSuccessStatusCode();
        string responseBody = await response.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody);
        
        // Get a specific user by id
        HttpResponseMessage response2 = await client.GetAsync("users/1");
        response2.EnsureSuccessStatusCode();
        string responseBody2 = await response2.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody2);
        
        // Post a new user to the service
        var newUser = new { name = "John Doe", username = "johndoe", email = "johndoe@example.com" };
        HttpResponseMessage response3 = await client.PostAsJsonAsync("users", newUser);
        response3.EnsureSuccessStatusCode();
        string responseBody3 = await response3.Content.ReadAsStringAsync();
        Console.WriteLine(responseBody3);
    }
}
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