using System;

using System.Collections;

using System.Collections.Generic;

using System.Text;

​

public class Program

{

    //  The user will input a sentence and we need to reverse the sequence of words in the sentence.

    //      input: Welcome to Csharp corner, output: corner Csharp to Welcome   

    public static void Main()

    {

        ReverseWordOrder("Welcome to Csharp corner");

    }

​

    internal static void ReverseWordOrder(string str)

    {

        string[] words = str.Split(new Char[]{' '});

        StringBuilder reverseSentence = new StringBuilder();

        for (int i = (words.Length - 1); i >= 0; i--)

        {

            reverseSentence.Append(words[i]);

            if (i != 0)

            {

                reverseSentence.Append(" ");

            }

        }

​

        Console.WriteLine(reverseSentence);

    }

}