WebEngine

gistfile1.txt

namespace Kimono
{
    public static class KimonoEngine
    {
        public static async Task<string> GetJson(string url)
        {
            using (var httpClient = new HttpClient())
            {
                var response = await httpClient.GetAsync(url);
                return await response.Content.ReadAsStringAsync();
            }
        }
    }
}

Wrong usage of the HTTPClient class (in .NET)

In .NET, as Simon Timms described in his article, you have to be careful when using the HTTPClient class.
Continuous instantiation and disposal of the HTTPClient object may create a socket exhaustion on your machine and affect performance.
Consider reusing the HTTPClient object throughout your calls for better performance.

https://aspnetmonsters.com/2016/08/2016-08-27-httpclientwrong/
https://ankitvijay.net/2016/09/25/dispose-httpclient-or-have-a-static-instance/