namespace System
{
    public struct ValueTuple<T1, T2, T3, T4> : IStructuralComparable, IStructuralEquatable, IComparable, IComparable<(T1, T2, T3, T4)>, IEquatable<(T1, T2, T3, T4)>, ITuple
    {
        public ValueTuple(T1 item1, T2 item2, T3 item3, T4 item4);
    }
}