BasicCrudMongoDb.cs

public async Task<string> CreateDocument(string collectionName, BsonDocument document)
        {
            string message = "nothing has happened";
            var collection = _mongoDatabase.GetCollection<BsonDocument>(collectionName);

            //insert collection
            await collection.InsertOneAsync(document);
            message = "updated data";
            return message;
        }

        public async Task<BsonDocument> GetFirstDataDocument(string collectionName)
		{
			var collection = _mongoDatabase.GetCollection<BsonDocument>(collectionName);
			var document = await collection.Find(new BsonDocument()).FirstOrDefaultAsync();
			return document;
		}

		public async Task<List<BsonDocument>> GetData (string collectionName)
		{
			var collection = _mongoDatabase.GetCollection<BsonDocument>(collectionName);
			List<BsonDocument> documents = await collection.Find(new BsonDocument()).ToListAsync();
			return documents;
		}

        public async Task<BsonDocument> SearchFirstDocumentResult (string collectionName, string attributeName, string searchTerm)
		{
            var collection = _mongoDatabase.GetCollection<BsonDocument>(collectionName);
            var filter = Builders<BsonDocument>.Filter.Eq(attributeName, searchTerm);
            var document = await collection.Find(filter).FirstAsync();
            return document;
        }

        public async Task<List<BsonDocument>> SearchListDocumentResult(string collectionName, string attributeName, string searchTerm)
        {
            var collection = _mongoDatabase.GetCollection<BsonDocument>(collectionName);
            var filter = Builders<BsonDocument>.Filter.Gt(attributeName, searchTerm);
            List<BsonDocument> documents = await collection.Find(filter).ToListAsync();
            return documents;
        }

        public async void UpdateDocument(string collectionName, string attributeName, string oldValue, string newValue)
        {
            var collection = _mongoDatabase.GetCollection<BsonDocument>(collectionName);
            var filter = Builders<BsonDocument>.Filter.Eq(attributeName, oldValue);
            var update = Builders<BsonDocument>.Update.Set(attributeName, newValue);
            await collection.UpdateOneAsync(filter, update);
        }

        public async void DeleteDocument(string collectionName, string attributeName, string value)
        {
            var collection = _mongoDatabase.GetCollection<BsonDocument>(collectionName);
            var filter = Builders<BsonDocument>.Filter.Eq(attributeName, value));
            await collection.DeleteOneAsync(filter);
        }