using System.Collections.Generic;
public static void Main()
char [] input = {'E','F','\n','E','F','6','\n','\r'};
Console.WriteLine("{0}:\t{1}", "Index", "Is Control");
for (int i = 0; i < input.Length; i++)
var result = input[i].IsControl();
Console.WriteLine("{0}:\t\t{1}", i, result);