How to remove all HTML Tags from specified string.

Here is a interesting piece of code to remove all tags.
Specially Html tags are remove and remains plain text.

//A pattern to find the HTML Tags
const string HTML_TAGS = "<.*?>";
        public static string RemoveHTML(string inputstr)
        {
            return Regex.Replace(inputstr, HTML_TAGS, string.Empty);
        }

//In Button's Click
label1.Text = RemoveHTML("THIS IS BODY");
OR
label1.Text = RemoveHTML(textBox1.Text);