The utility classes and extension methods I tend to pull along with me as I move from project to project. I basically got tired of re-writing them. Also as they slowly morphed, I wouldn't be sure which past project I should refer to when I was starting a new project (to make sure I got the latest...
This library contains the core set of useful Personal Data Interchange (PDI) and date utility classes for .NET applications. They can be used for calculating holiday dates, recurrences, etc. See the project website for the code, a help file, and demos.
This library contains classes used to create and consume vCard, vCalendar, and iCalendar files used to exchange contact and appointment information between applications such as Microsoft Outlook. See the project website for the code, a help file, and demos.