gistfile1.cs

var tuple = Tuple.Crate("hoge", 1);

// こうじゃなくて
var a = tuple.Item1;
var b = tuple.Item2;

var f = new Func<Tuple<string, int>, bool>(t => t.Item1.Length == t.Item2);

// こんな感じ
var (a, b) = tuple;

var f = new Func<Tuple<string, int>, bool>((s, x) => s.Length == x);

// これもできたらいいなあ
var (a, (b, c)) = (1, ("hello", false));