App.xaml.cs

using System;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using System.IO;

namespace MyDailyTaskManger
{
    public partial class App : Application
    {
        public static String FolderPath { get; private set; }

        public App()
        {
            InitializeComponent();
            FolderPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
            MainPage = new NavigationPage(new MainPage());
        }

        protected override void OnStart()
        {
        }

        protected override void OnSleep()
        {
        }

        protected override void OnResume()
        {
        }
       
    }
}