// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002640/array-trueforall

​

// @nuget: Z.ExtensionMethods

​

using System;

​

public class Program

{

    public static void Main()

    {

        String[] values1 = { "Y2K", "A2000", "DC2A6", "MMXIV", "0C3" };

        String[] values2 = { "Y2", "A2000", "DC2A6", "MMXIV_0", "0C3" };

​

        // C# Extension Method: Array - TrueForAll

        if (values1.TrueForAll(EndsWithANumber))

            Console.WriteLine("All elements end with an integer.");

        else

            Console.WriteLine("Not all elements end with an integer.");

​

        // C# Extension Method: Array - TrueForAll

        if (values2.TrueForAll(EndsWithANumber))

            Console.WriteLine("All elements end with an integer.");

        else

            Console.WriteLine("Not all elements end with an integer.");

    }

​

    private static bool EndsWithANumber(String value)

    {

        int s;

        return Int32.TryParse(value.Substring(value.Length - 1), out s);

    }

}