using System;

public class Program

{

    public static void Main()

    {

        Predicate<string> isUpper = IsUpperCase;

​

        bool result = isUpper("hello world!!");

        Console.WriteLine(result);

    }

    public static bool IsUpperCase(string str)

    {

        return str.Equals(str.ToUpper());

    }

​

}

​

​

//Salida:

//

//False