using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(IsPangram("Raw Danger! (Zettai Zetsumei Toshi 2) for the PlayStation 2 is a bit queer, but an alright game I guess, uh... CJ kicks and vexes Tenpenny precariously? This should be a pangram now, probably."));

        var foo = "Raw Danger! (Zettai Zetsumei Toshi 2) for the PlayStation 2 is a bit queer, but an alright game I guess, uh... CJ kicks and vexes Tenpenny precariously? This should be a pangram now, probably.";

        var foo2 = foo.GroupBy(c => c).Select(l => char.ToLower(l.First())).Where( s => s > 96 && s < 123).OrderBy(x => x);

        Console.WriteLine(foo2.Count());

​

        foreach(var l in foo2)

        {

            Console.WriteLine(l);

        }

    }

    public static bool IsPangram(string str)

      {

        if(string.IsNullOrEmpty(str)) return false;

​

        return str.GroupBy(c => c).Select(l => char.ToLower(l.FirstOrDefault())).Where( s => s > 96 && s < 123).Count() == 26 ? true : false;

      }

}

​

​

​