ASP.NET - Consumo de web Service

string page = "http://en.wikipedia.org/";

// ... Use HttpClient.

using (HttpClient client = new HttpClient())

using (HttpResponseMessage response = await client.GetAsync(page))

using (HttpContent content = response.Content)

{

    // leyendo respuesta

    string result = await content.ReadAsStringAsync();

    // ... muestra en la consola la respuesta

    if (result != null &&

        result.Length >= 50)

    {

        Console.WriteLine(result.Substring(0, 50) + "...");

    }