Get method

public static async Task<string> Get(string queryString)
{
  using(var httpClient = new HttpClient())
  {
    string authUserName = "user"
    string authPassword = "password"
    string url = "https://someurl.com";

    // If you do not have basic authentication, you may skip these lines
    var authToken = Encoding.ASCII.GetBytes($"{authUserName}:{authPassword}");
    httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", Convert.ToBase64String(authToken));

    // The actual Get method
    using (var result = await httpClient.GetAsync($"{url}{queryString}"))
    {
      string content = await result.Content.ReadAsStringAsync();
      return content;
    }
  }
}