XmlReader.GetAttribute Method (Int32)
When overridden in a derived class, gets the value of the attribute with the specified index.
Assembly: System.Xml (in System.Xml.dll)
i is out of range. It must be non-negative and less than the size of the attribute collection.
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.”
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.