private void IterateOverDictionaryUsingTupleDeconstruction()
{
    Dictionary<string, HashSet<string>> claims = GetClaims();
    foreach ((string claimType, HashSet<string> claimValues) in claims)
    {
        foreach (string claimValue in claimValues)
        {
            Console.WriteLine($"{claimType} = {claimValue}.");
        }
    }
}