private Trie game_dictionary = new Trie();
private bool loading_dictionary = true;
private void GenerateDictionary()
{
    using (var fs = new FileStream("dict.dat", FileMode.Open, FileAccess.Read))
    {
        var bf = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
        game_dictionary = bf.Deserialize(fs) as Trie;
    }
    loading_dictionary = false;
}