The ConnectionString property has not been initialized

I had this error:

The ConnectionString property has not been initialized.

I have a MSI installer, that is installed in our QA environment.

It was working before, and suddenly, I only had this error.
Googled up a bit, all this info on how to get the connection string and all that.

I finally realized that I rebuilt the whole solution, but I didn't rebuild the Deployment project. After a rebuild ... everything back to normal.

#:-S

Hope this helps someone.

The ConnectionString property has not been initialized.

The ConnectionString property has not been initialized.

????

:D

it is sooo easy. but you can waste a lot of time on this one.

Here is what was my problem:
1.) web.config:

< appSettings >
< add key="aaa" value="server=swoosh\sqlserver2k5;database=swdb;uid=sa;password=;" />
< / appSettings >

2.) accessing:
string strConnRSS = System.Configuration.ConfigurationManager.AppSettings["bbb"];

yes.
aaa <> bbb

Hope this'll help someone :)
don't look for anything too complicated :)