How to create Bson Document with Null value using C# official driver?

Question

I have objects with 3 string fields Country, Province, City. They can contain null or some string name.

I wanna query all data with the exact same values.

Fo

Answer 1

I assume you are working with BsonDocuments and not C# classs. Because of that, for null values, you need to use BsonNull.Value to represent null values in the database and in queries.