下面是一个使用样本的HttpClient：

Here is a sample using HttpClient:

public static async Task<String> Login(string username, string password)
{
    HttpClient Client = new HttpClient();
    Client.DefaultRequestHeaders.Add("Authorization", "Basic " + Convert.ToBase64String(StringToAscii(string.Format("{0}:{1}", username, password))));
    var response = await Client.GetAsync(new Uri(new Uri("http://yourdomain.com"), "/login"));
    var status= await response.Content.ReadAsAsync<String>();
    return status;
}

当然，你可以在互联网上找到的ToBase64String功能。这里最棘手的部分是Authorization头。

And of course you can find the ToBase64String function on the internet. The tricky part here is the Authorization header.