Assembly: mscorlib (in mscorlib.dll)
Beginning with the .NET Framework version 2.0, this property returns true for most unhandled exceptions, unless an application compatibility flag is used to revert to the behavior of versions 1.0 and 1.1. The reason is that most unhandled exceptions in threads, including thread pool threads, are allowed to proceed naturally, which normally results in termination of the application. For more information, including a list of cases in which the runtime does not terminate, see Exceptions in Managed Threads.
The following applies to the .NET Framework versions 1.0 and 1.1: This property returns true when an exception is received in, but not handled by, an application's main thread. This property also returns true if an unmanaged thread is executing managed code and receives an unhandled exception. Finally, this property returns false for thread pool threads and managed threads created by an application, because versions 1.0 and 1.1 catch unhandled exceptions in such threads and ignore them.
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.