Show list of all Dictionary Objects in MongoDB

Question

Another speed bump on my way to trying to use a Dictionary with a WebAPI. I am trying to implement something with MangoDB and this is only my second time so I am not very knowledgeable here. I have set up a connection with the following code.

private readonly IMongoCollection<Dictionary<Guid, Order>> ordersCollection;

public MongoDBRepository(IMongoClient mongoClient)
{
  IMongoDatabase database = mongoClient.GetDatabase(databaseName);
  ordersCollection = database.GetCollection<Dictionary<Guid, Order>>(collectionName);
}

Now I have implemented a way to save as I have verified it in the VSC MongoDB extension. I used the following code.

public void CreateOrder(Order order)
{
  var values = new Dictionary<Guid, Order>
  {
   {
     Guid.NewGuid(), order
   }
  };

  ordersCollection.InsertOne(values);
}

I've now added several Dictionaries to the DB and I want to get them all. The method in the controller I have says:

[HttpGet]
public Dictionary<Guid, API.Models.Order> GetOrders()
{
  var data = repository.GetOrders();
  return data;
}

The best I can figure then is that I need to implement something along the lines of:

 public Dictionary<Guid, Order> GetOrders()
 {
  return ordersCollection.Find(new BsonDocument()).ToDictionary();
 }

I did some searches and found https://mongodb.github.io/mongo-csharp-driver/2.0/apidocs/html/M_MongoDB_Bson_BsonDocument_ToDictionary.htm and I verified I have a using MongoDB.Bson but it doesn't appear. I am assuming it's because of the way I am utylizing orderCollection. I have found other questions on here using other methods but I only have access to InsertOne, InsertMany, Find, ReplaceOne... Any pointers would be appreciated.