Waiting to press a button in a loop

Tell me please! I am writing a mini testing program, I have registered the creation of an interface, the method is called from main.

private async void load_questions() { var data = await SendRequest(Url, ""); Grid grid = new Grid { RowDefinitions = { new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }, new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }, new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }, new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }, new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }, new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }, }, ColumnDefinitions = { new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) }, } }; // Label wopros = new Label { Text = data[0].text_question, FontSize = 20, HorizontalTextAlignment = TextAlignment.Center, VerticalTextAlignment = TextAlignment.Center }; int buf_prav = Result_test.prav; int buf_neprav = Result_test.neprav; while ((Result_test.prav == buf_prav) || (Result_test.neprav == buf_neprav)) { Label wopros = new Label { Text = data[Result_test.k].text_question, BackgroundColor = Color.Gray }; Label otwet1_ = new Label { Text = data[Result_test.k].text_Answers1 }; Button otwet1 = new Button { Text = "Ответ 1" }; otwet1.Clicked += otwet1_Clicked; Label otwet2_ = new Label { Text = data[Result_test.k].text_Answers2 }; Button otwet2 = new Button { Text = "Ответ 2" }; Label otwet3_ = new Label { Text = data[Result_test.k].text_Answers3 }; Button otwet3 = new Button { Text = "Ответ 3" }; Label otwet4_ = new Label { Text = data[Result_test.k].text_Answers4 }; Button otwet4 = new Button { Text = "Ответ 4" }; Label otwet5_ = new Label { Text = data[Result_test.k].text_Answers5 }; Button otwet5 = new Button { Text = "Ответ 5" }; grid.Children.Add(wopros, 0, 0); grid.Children.Add(otwet1_, 0, 1); grid.Children.Add(otwet1, 0, 2); grid.Children.Add(otwet2_, 0, 3); grid.Children.Add(otwet2, 0, 4); if (data[Result_test.k].text_Answers3 != "нет ответа ") { grid.Children.Add(otwet3_, 0, 5); grid.Children.Add(otwet3, 0, 6); } if (data[Result_test.k].text_Answers4 != "нет ответа ") { grid.Children.Add(otwet4_, 0, 7); grid.Children.Add(otwet4, 0, 8); } if (data[Result_test.k].text_Answers5 != "нет ответа ") { grid.Children.Add(otwet5_, 0, 9); grid.Children.Add(otwet5, 0, 10); } ScrollView scrollView = new ScrollView(); scrollView.Content = grid; this.Content = scrollView; Content = grid; } int i = 1; } 

And now the question arose how should I make the loop wait for the button to be pressed?