Specifies the targeted version of the .NET Framework when a version earlier than the current one is targeted.
Assembly: System.Configuration (in System.Configuration.dll)
When the configuration system serializes a hierarchy of configuration objects to XML, it checks the value of this property. If the property is not null, the configuration system performs version checks for each configuration section group and configuration section. The configuration system also performs version checks for individual configuration properties that are marked as having changed across versions. (For more information, see ConfigurationPropertyOptions.) The configuration system also performs version checks for configuration elements in configuration sections.
If the value of this property is null, the configuration system does not perform any version checks during serialization.