public App()
        {
            // The root page of your application
            MainPage = new ContentPage
            {
                Content = new StackLayout
                {
                    VerticalOptions = LayoutOptions.Center,
                    Children = {
                        new Label {
                            XAlign = TextAlignment.Center,
                            Text = "Welcome to Xamarin Forms!"
                        }
                    }
                }
            };

            Poc poc = new Poc();
        }
        public App()
        {
            // The root page of your application
            MainPage = new ContentPage
            {
                Content = new StackLayout
                {
                    VerticalOptions = LayoutOptions.Center,
                    Children        =
                    {
                        new Label {
                            XAlign = TextAlignment.Center,
                            Text   = "Welcome to Xamarin Forms!"
                        }
                    }
                }
            };

            Poc poc = new Poc();
        }