Public NotInheritable Class EntitySet(Of TEntity As Class) _
    Implements IList, ICollection, IList(Of TEntity),  _
    ICollection(Of TEntity), IEnumerable(Of TEntity), IEnumerable,  _
    IListSource

Dim instance As EntitySet(Of TEntity)

public sealed class EntitySet<TEntity> : IList, 
    ICollection, IList<TEntity>, ICollection<TEntity>, IEnumerable<TEntity>, 
    IEnumerable, IListSource
where TEntity : class

generic<typename TEntity>
where TEntity : ref class
public ref class EntitySet sealed : IList, 
    ICollection, IList<TEntity>, ICollection<TEntity>, IEnumerable<TEntity>, 
    IEnumerable, IListSource

JScript does not support generic types or methods.