Vb net xmlvalidatingreader obsolete
The reader only reports the first error for a given element.
New nodes not returned from the underlying reader may be added by this reader (for example, default attributes and the children of an entity reference).Both sections pointed to my external settings file "app Settings.config" but the first app Settings element using the attribute file whilst the other used the attribute config Source.I know the question was about the connection Strings.If you look at the Inner Exception of the thrown exception, it will tell you which section is the problem.I had this same problem with an MSTest class: Marlon Grech in his article says "the element has to be defined as the first element in the App.config." So make sure that is the first element in under the element. If you have User scoped settings you may also have a user.config file somewhere in the [Userfolder]\App Data\Local[Project Name] folder.
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Warning) that indicate that no schema information is available.