add new file: c# reverse words in string

algorithms/CSharp/README.md

@@ -30,6 +30,7 @@ To run the `.cs` file, kindly use [.Net Finddle](https://dotnetfiddle.net/)
 - [Palindrome](src/Strings/palindrome.cs)
 - [Trie](src/Strings/trie.cs)
 - [Character Limit](src/Strings/character-limit.cs)
+- [Reverse Words in String](src/Strings/reverse-words-in-string.cs)
 
 ## Search
 

algorithms/CSharp/src/Strings/reverse-words-in-string.cs

@@ -1,8 +1,6 @@
 using System;
 
-//Reverse the order of the words in a given string
-//Example: "Hello World" becomes "World Hello"
-
+//Time Complexity: O(n)
 namespace Algorithms.Strings
 {
     public class ReverseWordsInString
@@ -15,6 +13,8 @@ namespace Algorithms.Strings
             Console.WriteLine(ReverseWords(originalString));
         }
 
+        //Reverse the order of the words in a given string
+        //Example: "Hello World" becomes "World Hello"
         public static string ReverseWords(string input)
         {
             string[] words = input.Split(' ');