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