#if NET20 || NET30 || !NET_4_6
using System.Collections.Generic;

namespace System.Linq.Reimplement
{
#if NETCF

    public interface IGrouping<TKey, TElement> : IEnumerable<TElement>
#else

    public interface IGrouping<out TKey, TElement> : IEnumerable<TElement>
#endif
    {
        TKey Key { get; }
    }
}

#endif