System.Windows.Forms 2.0.0.0 System.Enum This enumeration is used by . In the .NET Framework version 2.0, the common language runtime behavior changed to allow unhandled exceptions to propagate up the call stack. This behavior can be disabled via the application configuration file. For more information, see Exceptions in Managed Threads. Defines where a Windows Forms application should send unhandled exceptions. Field System.Windows.Forms.UnhandledExceptionMode Route all exceptions to the handler, unless the application's configuration file specifies otherwise. 2.0.0.0 Field System.Windows.Forms.UnhandledExceptionMode Always route exceptions to the handler. Ignore the application configuration file. 2.0.0.0 Field System.Windows.Forms.UnhandledExceptionMode Never route exceptions to the handler. Ignore the application configuration file. 2.0.0.0