C# 程序检查字符串是否为全字词

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

using System; using System.Collections.Generic; using System.Linq; using System.Text.RegularExpressions; namespace Demo { public class Program { public static void Main(string []arg) { string str = "The quick brown fox jumps over the lazy dog"; Console.WriteLine("{0}: \"{1}\" is pangram", checkPangram(str), str); Console.ReadKey(); } static bool checkPangram(string str) { return str.ToLower().Where(ch => Char.IsLetter(ch)).GroupBy(ch => ch).Count() == 26; } } }

True: "The quick brown fox jumps over the lazy dog" is pangram