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

The MongoDB Driver does provide a method for deserializing from Bson to your type. The BsonSerializer can be found in MongoDB.Bson.dll, in the MongoDB.Bson.Serialization namespace.

You can use the BsonSerializer.Deserialize() method. Some example code would be

var obj = new MyClass { MyVersion = new Version(1,0,0,0) };
var bsonObject = obj.ToBsonDocument();
var myObj = BsonSerializer.Deserialize(bsonObject);
Console.WriteLine(myObj);

Where MyClass is defined as

public class MyClass
{
    public Version MyVersion {get; set;}
}

I hope this helps.