Restsharp返回错误404，但链接在Web浏览器中工作

Question

我正在尝试向web api发送一些数据，但是我收到错误404：找不到。我尝试在网络浏览器中链接，它工作正常。我使用restsharp发布请求。这是我的代码：

        var restClient = new RestClient(baseUrl);
        var request = new RestRequest(resource);
        request.Method = Method.POST;
        restClient.CookieContainer = new System.Net.CookieContainer();
        restClient.UserAgent = "Windows Phone";
        restClient.FollowRedirects = false;
        request.AddHeader("Content-Type", "application/json; charset=utf-8");
        request.RequestFormat = DataFormat.Json;
        request.AddBody(new ScoreInputModel{ username = uname, email = mail, password = pass, gender = "Male" });            
        try
        {
            restClient.ExecuteAsync(request, (response) =>
            {
                try
                {
                    MessageBox.Show(response.Content.ToString());
                }
                catch
                {
                    MessageBox.Show("error");
                }

            });
        }
        catch
        {
            MessageBox.Show("error");
        }
    }