using System;

using System.Net.Http;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        var responseBody = Task.Run(async () => await GetData(@"https://jsonplaceholder.typicode.com/posts", "")).Result;

        Console.WriteLine(responseBody);

    }

    public static async Task<string> GetData(string url, string data)

    {

        HttpClient client = new HttpClient();

        StringContent queryString = new StringContent(data);

​

        HttpResponseMessage response = await client.PostAsync(new Uri(url), queryString );

​

        //response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");

        response.EnsureSuccessStatusCode();

        //Burası çokomelli bu veya ReadAsStreamAsync olacak.

        string responseBody = await response.Content.ReadAsStringAsync();

​

        return responseBody;

    }

}