Changing connectionString at runtime in VB.NET 2005


VB.NET 2005 has connectionString value in the <configuration> file (.config) of the project.  I need to be able to change this at run time the app will run against many different SQL Servers.  

If I do this:
My.Settings.MyConnString = strMyString
it tells me it's a read only property.

How can I change it at run-time?

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bfeddishAsked:
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pavanipoluCommented:
If you want to write the connection string to the config file at runtime?

You can open the configuration file as Xml document and update the connection string by finding the element in the
xml doc. You can finally save the Xml document

for example:
           node = configDoc.SelectSingleNode("configuration")
            node1 = node.SelectSingleNode("appSettings")
            elem = CType(node1.SelectSingleNode(String.Format("add[@key='{0}']", "updated")), Xml.XmlElement)
            elem.SetAttribute("Connection", "The Full Connection String here")

            configDoc.Save(Reflection.Assembly.GetExecutingAssembly().Location + ".config")

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