Hi Meghana M,

You can utilize the power of regular expressions and string manipulation. Here's an example code snippet that demonstrates how to achieve this:

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        string text = "
This is a sample text with 
tags
 that need to be replaced.
";
        
        // Replace multiple   tags and 
 tag with blank space
        text = Regex.Replace(text, @"( )+|]*>", " ");
        
        // Replace 
 to 
 tags with  tag
        text = Regex.Replace(text, @"]*>", "");
        text = Regex.Replace(text, @"", "");
        
        // Replace 
 and 
 tags with "$" for ordered list and " | " for unordered list
        text = Regex.Replace(text, @"]*start=""4"">|]*start=""NaN"">", "$");
        text = Regex.Replace(text, @"
", " | ");
        
        Console.WriteLine(text);
    }
}