XmlReader.MoveToAttribute Method (Int32)
When overridden in a derived class, moves to the attribute with the specified index.
Assemblies: System.Xml (in System.Xml.dll)
System.Xml.ReaderWriter (in System.Xml.ReaderWriter.dll)
An XmlReader method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message “An asynchronous operation is already in progress.”
The parameter has a negative value.