private async Task <List <Post> > GetAsync()
 {
     try
     {
         using (var db = new UWPSQLiteDbContext())
         {
             return(await db.Posts.ToListAsync());
         }
     }
     catch (Exception)
     {
         throw;
     }
 }
 private async Task <bool> AddAsync(Post post)
 {
     try
     {
         using (var db = new UWPSQLiteDbContext())
         {
             db.Posts.Add(post);
             return((await db.SaveChangesAsync()) > 0);
         }
     }
     catch (Exception)
     {
         throw;
     }
 }