在.net中设置post参数的等效方法是什么？

using (WebClient client = new WebClient())
{
    client.Headers["Content-Type"] = "application/x-www-form-urlencoded";
    string response = client.UploadString("http://example.com/api/data", "POST", "param1=value1&param2=value2");
    Console.WriteLine(response);
}

using (HttpClient client = new HttpClient())
{
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded"));
    var content = new StringContent("param1=value1&param2=value2", Encoding.UTF8, "application/x-www-form-urlencoded");
    var response = await client.PostAsync("http://example.com/api/data", content);
    Console.WriteLine(await response.Content.ReadAsStringAsync());
}