user settings

good articles on user settings. I reviewed the top 3 items and get good hands on them.

1. Versatile Application Settings
2. Share User Settings Between Applications
3. User Settings Applied
4. Windows Forms User Settings in C#
5. Saving User Settings in Winform Application
6. Renaming User Settings properties between software versions
7. Windows Forms - Creating and Persisting Custom User Settings in C# -Part 1
8. Windows Forms - Creating and Persisting Custom User Settings in C# - Part 2
9. Handling Corrupt "user.config" Settings