How to solve Value cannot be null.Parameter name: activationContext

Go to project's properties, then to security and uncheck Enable ClickOnce Security Settings.
Hope this will help

Auto Update for windows appliction in C#

Last week I learn an interesting lesson about using auto update for windows applications.
This auto update will update the application in client computer when the is a new update for the application. This can be done by wyupdate. It is open source.

All the file can be place in one server, and the client's pc will point into the server to check whether got new update or not. This can be done by autoupdate or user click one update's button.

Database is down

Argghhh!!! Today too many table change in the database, so database already down for more than 2 hours. All developers are stuck with their job. Waste lot of time.

As I heard from my seniors, this is the common situation in project development; table change, database always down, requirement change and etc. So this is the challenge of project development and it is a big project. Many said that we will learn a lot of things if we involve in project development.