private void addActivity(GridLayout_Builder builder, Activity activity)
        {
            Button otherActivityButton = new Button();

            otherActivityButton.Clicked += OtherActivityButton_Clicked;
            this.activitiesByButton[otherActivityButton] = activity;
            builder.AddLayout(new ButtonLayout(otherActivityButton, activity.Name, this.fontSize));
        }
 private void addSection(GridLayout_Builder builder, List <Activity> activities, string title)
 {
     if (this.showSectionTitles && activities.Count > 0)
     {
         builder.AddLayout(new TextblockLayout(title, fontSize));
     }
     foreach (Activity activity in activities)
     {
         this.addActivity(builder, activity);
     }
 }