http://weblogs.asp.net/bsimser/archive/2008/04/30/invalid-sharepoint-url-character-cheat-sheet.aspxA few days ago I posted some code to clean out invalid characters in SharePoint URLs . Someone suggested using the SPEncode.IsLegalCharInUrl method to do this. While this might be easy if you're in SharePoint land, I don't like having a dependency onenCommunityServer 2007 SP1 (Build: 20510.895)