App.config Connection string

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VB

Hie!

I am using vb.net 2005 winapplication with ms access.
i am trying to make mi connectionstring global.
for that is put these lines of code in app.config.

<connectionStrings>

    <add name="Test.My.MySettings.TransportConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|\Transport.mdb;"
    providerName="System.Data.OleDb" />


</connectionStrings>

but after that when i am calling this connectionstring in forms as per i know how to call i use this code.

dim st as string
st=system.configuration.configurationmanager.appsetting("name of connection string")

but this line not excute means when i am trying to write this code after

system.configuration. it will not display listitem for configurationmanager.


so please tell me how to call connectionstring from app.config file.