I was able to set up DB connection in APP.conflg
Once it is stored in the List
I want to display it in TxetBox etc. with a button click event,

The flow is considered as SQL execution->store in list->disconnect SQL.

I am referring to the following website,
I'm confused about what I'm looking at.

Link Content

Link content

Is the web i am referring to wrong?
Is it wrong to implement it?

Can you tell me?

pc: Windows 7
DB: Oracle
Development environment: Visual Studio 2008