Is this legal? Does it contain a hidden bug or flaw? Visual studio does not give any errors or warnings but ReSharper does:
/// <summary>
/// immutable tuple for two
/// </summary>
public class Pair<TValue1, TValue2> : Singleton<TValue1>
{
public TValue2 Value2 { get; private set; }
public Pair(TValue1 value1, TValue2 value2, Func<Pair<TValue1, TValue2>, String> toStringFunc)
: this(value1, value2, () => toStringFunc(this)) { } //Red light
}2> : Singleton<TValue1>