如何用LINQ计算字符串数组中的单词？

using System;
using System.Linq;

class Program
{
    static void Main()
    {
        string[] words = { "apple", "banana", "orange", "grape" };

        var wordCount = (from word in words
                         select word).Count();

        Console.WriteLine("The number of words in the array is: " + wordCount);
    }
}