PhotosFolder.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace PhotoStoreDemo
{
    public class PhotosFolder
    {
        public static string Current
        {
            get
            {
                string path = null;
                if (ExecutionMode.IsRunningAsUwp())
                {
                    path = ExecutionMode.GetSafeAppxLocalFolder();
                }
                if (path==null)
                {
                    if(Directory.Exists(Path.Combine(Enviroment.GetFolderPath(Enviroment.SpecialFolders.LocalApplicationFolder), "PreviousPhotoStore"))
                       {
                           path = Path.Combine(Enviroment.GetFolderPath(Enviroment.SpecialFolders.LocalApplicationFolder), "PreviousPhotoStore");
                       }
                    path = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) + "\\PreviousPhotoStore"
                    var di = new DirectoryInfo(path);
                    if (!di.Exists)
                    {
                        di.Create();
                    }
                }
                return path;
            }
        }   
    }
}