BsonDiscriminator examples

class.cs

// base class

[BsonDiscriminator(RootClass = true)]
[BsonKnownTypes(typeof(Cat), typeof(Dog))]
public abstract class Animal 
{        
    public string id { get; set; }
    public string name { get; set; }
    public int age { get; set; }
}

// children

[BsonDiscriminator("Cat")]
public class Cat : Animal
{
    public string furballCount { get; set; }
}

[BsonDiscriminator("Dog")]
public class Dog : Animal
{
    public string boneCount { get; set; }
}

// example queries

var cats = DocDb.GetQueryable<Animal>().OfType<Cat>().ToList();
var dogs = DocDb.GetQueryable<Animal>().OfType<Dog>().ToList();