Insert a new field into an existing collection (many documents) in MongoDB using C# driver

Question

How can I insert a new field into a MongoDB collection using the C# `Update` API? What I am trying to do: I have a `HomePhoneId` field that I need to insert into every document in my `People` collection. Any ideas?

Accepted Answer

Following code should work:

```
collection.Update(Query.Null, Update.Set("HomePhoneId", "some value"), UpdateFlags.Multi)
```

Btw, here is you can look into driver documentation.

Insert a new field into an existing collection (many documents) in MongoDB using C# driver

Solution

Problem