gistfile1.cs

public class TupleFunc
{
    public static Func<Tuple<T1, T2>, TResult> Create<T1, T2, TResult>(Func<T1, T2, TResult> f)
    {
        return new Func<Tuple<T1, T2>, TResult>(t => f(t.Item1, t.Item2));
    }
}

public static Main{
  static void Main()
  {
      var f = TupleFunc.Create((string s, int x) => s.Length == x);
  }
}