​

using System;

using System.Linq;

​

public class Program

{

   public static void Main()

    {

        string s = "The quick brown fox jumps over the lazy dog";

        Console.WriteLine("It's {0} that \"{1}\" is a pangram", IsPangram(s), s);

        string t = "Doc, note: I dissent. A fast never prevents a fatness. I diet on cod.";

        Console.WriteLine("It's {0} that \"{1}\" is a palindrome", IsPalindrome(t), t);

        string u = "The quick brown fox jumped over the lazy dog";

        Console.WriteLine("It's {0} that \"{1}\" is a pangram", IsPangram(u), u);

        string v = "Madam, I'm Eve";

        Console.WriteLine("It's {0} that \"{1}\" is a palindrome", IsPalindrome(v), v);

        Console.ReadKey();

    }

​

    static bool IsPangram(string s)

    {

        return s.ToLower().Where(c => Char.IsLetter(c)).GroupBy(c => c).Count() == 26;

    }

​

    static bool IsPalindrome(string s)

    {

        var s1 = s.ToLower().Where(c => Char.IsLetter(c));

        var s2 = s.ToLower().Reverse().Where(c => Char.IsLetter(c));

        return s1.SequenceEqual(s2);

    }

}