XmlReader.ReadElementString Method (String)
Checks that the Name property of the element found matches the given string before reading a text-only element. However, we recommend that you use the ReadElementContentAsString() method instead, because it provides a more straightforward way to handle this operation.
Assembly: System.Xml (in System.Xml.dll)
If the next content node is not a start tag; if the element Name does not match the given argument; or if the element found does not contain a simple text value.
Available since 1.1