WebUtility.UrlEncode ("あい うえお"); こちらを使う System.Uri.EscapeUriString ("あい うえお");

void Sample () { Hoge hoge = new Hoge (); hoge.OnSuccess += (sender, e) => { Console.WriteLine ("end"); }; } async Task Sample () { var taskCompletionSource = new TaskCompletionSource<string>(); Hoge hoge = new Hoge (); hoge.OnSuccess += (sender, </string>…