Regex for TSQL comments

This regular expression will help you to match comments in TSQL code.
Single line comments (--)  and multiline (/**/) are supported. Multiline comments can be nested one into another. Only one level of nesting is supported.

/\*(?>(?:(?!\*/|/\*).)*)(?>(?:/\*(?>(?:(?!\*/|/\*).)*)\*/(?>(?:(?!\*/|/\*).)*))*).*?\*/|--.*?\r?[\n]|--.*?$

We used this regular expression to remove all comments from TSQL before analysis.

Inspired by http://stackoverflow.com/a/7690874/1012986

How to find unused controls registration in ASP.NET

In order to find unused controls registration this regular expression might be helpfull

<%@\s*Register\s+TagPrefix\s*=\s*"(?<tagprefix>[^"]+)"\s+TagName\s*=\s*"(?<tagname>[^"]+)"\s+Src\s*=\s*"[^"]+"\s*%>(?!.*?\k<tagprefix>:\k<tagname>\s+)

I used powergrep to run this regex. The "Dot matches newline" checkbox should be enabled to work properly.