MongoDB, after redefining the class, Mongo ignores the insert or any action against that class

Question

Guys,

Have you ever been in this situation?

Say, you define a class Student, and use it to store data into MongoDB Later, you modify the class Student and want to store data into MongoDB and then notice Mongo doesn’t actually insert the data.

Has anyone know the reason why? It is not a radical change to the class, instead only adding couple new properties.

PS: I am using mongo c# driver.

Thanks..