using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string ss = "<b><i>The tag is about to be removed</i></b>";

        Regex regex = new Regex("\\<[^\\>]*\\>");

        // Console.WriteLine(String.Format("<b>Before:</b>{0}", ss)); // HTML Text

        ss = regex.Replace(ss, String.Empty);

        // Console.WriteLine(String.Format("<b>After:</b>{0}", ss));// Plain Text as a OUTPUT

    }

}