static void Main(string[] args)
{
Post post = Post.FindPosts(@"C:\Users\Ewgraf\Documents\GitHub\poster\poster\bin\Debug\netcoreapp3.0\posts")
.First();
Poster[] posters = Poster.FindPosters(@"C:\Users\Ewgraf\Documents\GitHub\poster\poster\bin\Debug\netcoreapp3.0\posters");
;
foreach (Poster poster in posters.Where(p => p is VkPoster))
{
poster.Post(post).Wait();
}
}