C#:
שליחת בקשת HTTP עם אימות בסיסי

using System;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        var url = "http://your-api-url.com";
        var username = "your-username";
        var password = "your-password";

        using var client = new HttpClient();
        var byteArray = Encoding.ASCII.GetBytes($"{username}:{password}");
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(byteArray));

        HttpResponseMessage response = await client.GetAsync(url);
        if(response.IsSuccessStatusCode)
        {
            Console.WriteLine("Success:");
            Console.WriteLine(await response.Content.ReadAsStringAsync());
        }
        else
        {
            Console.WriteLine("Error:");
            Console.WriteLine(response.StatusCode);
        }
    }
}