tuple conversion options

TupleConversion.cs

(string name, int age) t = ("Johnny", 29);

/* Covariance */
(object name, int age) t1 = t;

/* Truncation */
(object name) t2 = t;

/* Reordering */
(int age, string name) t3 = t;

/* Renaming */
(string n, int a) t4 = t;