using System;

using System.Globalization;

using System.Linq;

using System.Diagnostics;

​

public class Program

{

    public static void Main()

    {

        string[] s = new string[]{"1st","2nd","3rd","4th","5th","6th","7th","8th","9th","10th","11th","12th","13th"};

        string val = "123rd";

        if (s.Any(i=> val.EndsWith(i))

            && val.Substring(0,val.Length-2).All(i=>char.IsDigit(i)) )

        {

            Console.WriteLine("it works");

        }

    }

​

    public static void methodtest()

    {

        int i = 0;

        long totalTime = 0;

        Stopwatch swInititation = Stopwatch.StartNew();

        Test("amar work", true);

        Test("amar work", false);

        swInititation.Stop();

        totalTime = totalTime + swInititation.ElapsedTicks;

        totalTime = 0;

        i = 0;

        while (i < 100)

        {

            Stopwatch sw = Stopwatch.StartNew();

            Test("amar " + i + "work", false);

            sw.Stop();

            totalTime = totalTime + sw.ElapsedTicks;

            i++;

        }

​

        Console.WriteLine(i + ": Time taken old :" + totalTime);

        totalTime = 0;

        i = 0;

        while (i < 100)

        {

            Stopwatch sw = Stopwatch.StartNew();

            Test("amar " + i + "work", true);

            sw.Stop();

            totalTime = totalTime + sw.ElapsedTicks;

            i++;

        }

​

        Console.WriteLine(i + ": Time taken new :" + totalTime);

    }

​

    static async void  Test(string Input, bool newtrick, bool showInputOutput = false)

    {

        TextInfo textInfo = new CultureInfo("en-US", false).TextInfo;

        string output = string.Empty;

        if (!newtrick)

        {

            output = ConvertStringToTitleCase(Input, null, textInfo);

        }

        else

        {

            output = ConvertStringToTitleCaseNewTrick(Input, null, textInfo);

        }

​

        if (showInputOutput)

            Console.WriteLine(" input : " + Input + " output : " + output);

    }

​

    private static string ConvertStringToTitleCase(string input, string transactionId, TextInfo textInfo)

    {

        if (string.IsNullOrWhiteSpace(input))

        {

            return input;

        }

​

        string title = textInfo.ToTitleCase(input);

        string[] arr = title.Split(' ');

        for (int i = 0; i < arr.Length; i++)

        {

            if (arr[i].Any(a => char.IsDigit(a)))

            {

                arr[i] = arr[i].ToLower();

            }

        }

​

        string result = string.Join(" ", arr);

        //Log.Debug(this, configuration[LogConstants.Request], string.Format("Title case conversion:- input:{0} ,title:{1} ,result:{2}", input, title, result), transactionId);

        return result;

    }

​

    private static string ConvertStringToTitleCaseNewTrick(string input, string transactionId, TextInfo textInfo)

    {

        if (string.IsNullOrWhiteSpace(input))

        {

            return input;

        }

​

        string title = textInfo.ToTitleCase(input);

        bool isNumericFound = false;

        string[] arr = title.Split(' ');

        for (int i = 0; i < arr.Length; i++)

        {

            if (arr[i].Any(a => char.IsDigit(a)))

            {

                arr[i] = arr[i].ToLower();

                isNumericFound = true;

            }

        }

​

        //Console.WriteLine(isNumericFound);

        string result = isNumericFound ? string.Join(" ", arr) : title;

        //Log.Debug(this, configuration[LogConstants.Request], string.Format("Title case conversion:- input:{0} ,title:{1} ,result:{2}", input, title, result), transactionId);

        return result;

    }

}