namespace System.Workflow.ComponentModel
{
    [DefaultMember("Item")]
    [DesignerSerializer(typeof(ActivityCollectionMarkupSerializer), typeof(WorkflowMarkupSerializer))]
    [Obsolete("The System.Workflow.* types are deprecated.  Instead, please use the new types from System.Activities.*")]
    public sealed class ActivityCollection : List<Activity>, ICollection<Activity>, IEnumerable<Activity>, IList<Activity>, ICollection, IEnumerable, IList
    {
        public int IndexOf(Activity item);
    }
}