using System;

public class Program

{

    public static void Main()

    {

        var testString = "<div>1. Click Insert and then choose "+

            "the elements you want from the different galleries. "+

            "Themes and styles also help keep your document coordinated.</div><br>"+

            "<div>2.Click Insert and then choose the elements you want from the different galleries. "+

            "Themes and styles also help keep your document coordinated."+"</div><br>";

        Console.WriteLine(ConvertHTMLToText(testString));

    }

     public static string ConvertHTMLToText(string sourceText)

        {

            var result = sourceText;

​

            result = result.Replace("<div>", "\n");

            result = result.Replace("<br>", "\n");

            result = result.Replace("<div/>", "\n");

            result = result.Replace("<br/>", "\n");

            result = result.Replace("</div>", "\n");

            result = result.Replace("</br>", "\n");

​

            result = result.Replace("<p>", "\n\n");

            result = result.Replace("<p/>", "\n\n");

            result = result.Replace("</p>", "\n\n");

         return result;

     }

}