how to convert the html tags and get a message in string

Answer 1

Use Regular expressions

Regex.Replace(msg, "<.*?>", string.Empty);

Answer 2

This should help you.

public string Strip(string text)
{
    return Regex.Replace(text, @”<(.|\n)*?>”, string.Empty);
}

to remove a perticular tag try this one http://urenjoy.blogspot.com/2008/10/remove-html-tags-from-string.html