Remove HTML tags using regular expressions

// String regexstr = @ "<[^>] *>"; // remove all tags

// @ "<SCRIPT [^>] *?>. *? </SCRIPT> "// remove all scripts and delete the intermediate part.

// String regexstr = @ "] *>"; // remove the regular expression of the image.

// String regexstr = @ "<(?! BR). *?> "; // Remove all tags with only BR left

// String regexstr = @ "<Table [^>] *?>. *? </Table> "; // remove all contents in the table.

String regexstr = @ "<(?! IMG | BR | p |/P). *?> "; // Remove all tags, with only IMG, BR, and P left.