namespace System { public struct ValueTuple : IStructuralComparable, IStructuralEquatable, IComparable, IComparable<ValueTuple>, IEquatable<ValueTuple> { public int CompareTo(ValueTuple other); public static ValueTuple Create(); public static ValueTuple<T1> Create<T1>(T1 item1); public static (T1, T2) Create<T1, T2>(T1 item1, T2 item2); public static (T1, T2, T3) Create<T1, T2, T3>(T1 item1, T2 item2, T3 item3); public static (T1, T2, T3, T4) Create<T1, T2, T3, T4>(T1 item1, T2 item2, T3 item3, T4 item4); public static (T1, T2, T3, T4, T5) Create<T1, T2, T3, T4, T5>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5); public static (T1, T2, T3, T4, T5, T6) Create<T1, T2, T3, T4, T5, T6>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5, T6 item6); public static (T1, T2, T3, T4, T5, T6, T7) Create<T1, T2, T3, T4, T5, T6, T7>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5, T6 item6, T7 item7); public static (T1, T2, T3, T4, T5, T6, T7, T8) Create<T1, T2, T3, T4, T5, T6, T7, T8>(T1 item1, T2 item2, T3 item3, T4 item4, T5 item5, T6 item6, T7 item7, T8 item8); public bool Equals(ValueTuple other); } }