How to convert a BsonDocument into a strongly typed object with the official MongoDB C# driver?

Question

For unit testing purposes, I\'d like to test my class mappings without reading and writing documents into the MongoDB database. To handle special cases such as circular parent

Answer 1

Use yield keyword to return data as you want.

public IEnumerable GetMongoFields(string collectionName)
        {
            var connectionString = ConfigurationManager.ConnectionStrings[DbConfig.GetMongoDb()].ConnectionString;
            var databaseName = MongoUrl.Create(connectionString).DatabaseName;
            MongoClient client = new MongoClient(connectionString);
            var server = client.GetServer();
            var db = server.GetDatabase(databaseName);

            var collection = db.GetCollection(collectionName);
            var list = collection.FindAll().ToList();

           yield return list.ToJson();
        }