Get connection string from app.config

Store your connection stirng in the app.config like this:
< name="YourName" connectionstring="Persist Security Info=False;Data Source=Database_Name;Initial Catalog=Table_Name;Integrated Security=SSPI;Trusted_Connection=TRUE;Application Name=Application_Name" providername="System.Data.SqlClient"> < /connectionStrings >

To use:
Dim SqlConnection As New SqlConnection("GetConnectionString("YourName"))
Snippet

Public Shared Function GetConnectionString(ByVal strConnection As String) As String
'Declare a string to hold the connection string
Dim sReturn As New String("")
'Check to see if they provided a connection string name
If Not String.IsNullOrEmpty(strConnection) Then
'Retrieve the connection string fromt he app.config
sReturn = ConfigurationManager. & _
ConnectionStrings(strConnection).ConnectionString
Else
'Since they didnt provide the name of the connection string
'just grab the default on from app.config
sReturn = ConfigurationManager. & _
ConnectionStrings("YourConnectionString").ConnectionString
End If
'Return the connection string to the calling method
Return sReturn
End Function