Visual Studio 2005 and 2008 contained an (not officially supported) feature that allows display of vertical guidelines in the (code) text editor. The feature is quite a hack, because a manual change in the Windows registry is needed. Visual Studio 2010 however, seems to completely miss this feature (see here: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=484758).

Not only do I like this feature to be return in Visual Studio 2010, I like better support for it and it to be configurable on a project level (with VS2005 and VS2008 this is only possible on machine user level, because it is a HKEY_CURRENT_USER setting).

Many development teams use coding rules that state that a line of code must not exceed a certain amount of characters. Guidelines visualize this and help developers obey by these rules. This however is a problem when a single developer works on multiple projects with different rules about characters per line.

This problem can be solved by enabling guidelines to be specified on a per project basis.