使用string []进行包含的最快方法

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        string[] array = { "apple", "banana", "orange" };
        HashSet<string> set = new HashSet<string>(array);

        Console.WriteLine(set.Contains("apple")); // True
        Console.WriteLine(set.Contains("grape")); // False
    }
}