[SerializableAttribute]
public class AnonymousObject<T1, T2, T3, T4>

<SerializableAttribute>
Public Class AnonymousObject(Of T1, T2, T3, T4)

[SerializableAttribute]
generic<typename T1, typename T2, typename T3, typename T4>
public ref class AnonymousObject

[<SerializableAttribute>]
type AnonymousObject<'T1, 'T2, 'T3, 'T4> =  class end