C# ile HTTP Request Botu Kodlamak (GET/POST + Header)

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

static async Task GetIstegiGonder()
{
    using (HttpClient client = new HttpClient())
    {
        client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0");

        var response = await client.GetAsync("https://example.com");
        string content = await response.Content.ReadAsStringAsync();

        Console.WriteLine(content);
    }
}

static async Task PostIstegiGonder()
{
    using (HttpClient client = new HttpClient())
    {
        var postData = new FormUrlEncodedContent(new[]
        {
            new KeyValuePair<string, string>("kullanici", "kerim"),
            new KeyValuePair<string, string>("sifre", "123456")
        });

        var response = await client.PostAsync("https://example.com/login", postData);
        string result = await response.Content.ReadAsStringAsync();

        Console.WriteLine(result);
    }
}

client.DefaultRequestHeaders.Add("Authorization", "Bearer API-TOKEN");
client.DefaultRequestHeaders.Add("Referer", "https://example.com");

await GetIstegiGonder();
await PostIstegiGonder();