Polymorphic lists do not have correct type

When I have a polymorphic list like in the example below, the generated C# client defines the list as of the first type (in this case Dog). Dog and Snake in this example are both derived from the same model.

"friends": {
  "type": "array",
  "items": {
    "oneOf": [
      {
        "$ref": "#/components/schemas/Dog"
      },
      {
        "$ref": "#/components/schemas/Snake"
      }
    ]
  }
}

public System.Collections.Generic.ICollection<Dog> Friends { get; set; }

[nrawe]

Just wanted to note that this is also an issue for TypeScript generation as well. I’m not sure if the output would be entirely the same, and I can provide a sample input/output if that helps? Many thanks.

[DerKobe]

Both models Dog and Snake have the same base class in C# which is expressed via

allOf:
  - $ref: "#/components/schemas/Animal"

in each of those models. In my case all $refs in the list have the same base class so it would be possible to infere the base class and pick it as the collection’s type. But I don’t know what to do in other cases where the is a mixed $refs list with no common base model.