Request with Client Certificate

gistfile1.txt

X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadOnly);
var cert = store.Certificates.Find(X509FindType.FindByThumbprint, "ff9afddf408ccd62a5dc83aacc48f8432ab7c86c", false)[0];

var messageHandler = new WebRequestHandler();
messageHandler.ClientCertificates.Add(cert);
messageHandler.ClientCertificateOptions = ClientCertificateOption.Manual;

HttpClient httpClient = new HttpClient(messageHandler);
var result = httpClient.GetAsync("https://clientcertificatetesting.azurewebsites.net/").Result;
store.Close();