public async void InitaliseNewDB(List <Models.MovieModel> movieInfos) { //Connection zur db aufbauen IMongoDatabase db = client.GetDatabase(Const.MongoDbConst.DbName); //alle Collections erstellen db.CreateCollection("Users"); db.CreateCollection("Movies"); db.CreateCollection("BucketLists"); //Für alle Colections bearbeitbare Objekte erzeugen var userCollection = db.GetCollection <BsonDocument>("Users"); var movieCollection = db.GetCollection <BsonDocument>("Movies"); var bucketListCollection = db.GetCollection <BsonDocument>("BucketLists"); //Liste, in die alle neu erzeugten User kommen List <BsonDocument> movieList = new List <BsonDocument>(); //Liste füllen foreach (var movie in movieInfos) { movieList.Add(new BsonDocument(movie.ToBsonDocument())); } //neuer User var user = new User() { Name = "test", Password = "******", MoviesWatchedIds = new List <ObjectId>(), BucketListsInvolvedIn = new List <ObjectId>(), Id = new ObjectId() }; //neue BucketList var bucketList = new BucketList() { Name = "testList", ListId = new ObjectId(), MoviesToWatchIds = new List <ObjectId>(), UsersInListId = new List <ObjectId>() { user.Id } }; //Alle Collections schreiben await movieCollection.InsertManyAsync(movieList); await userCollection.InsertOneAsync(user.ToBsonDocument()); await bucketListCollection.InsertOneAsync(bucketList.ToBsonDocument()); }