Visual Basic .NET Language Error Handling Critical Exceptions
Example
Generally most of the exceptions are not that critical, but there are some really serious exceptions that you might not be capable to handle, such as the famous System.StackOverflowException. However, there are others that might get hidden by Catch ex As Exception, such as System.OutOfMemoryException, System.BadImageFormatException and System.InvalidProgramException. It is a good programming practice to leave these out if you cannot correctly handle them. To filter out these exceptions, we need a helper method:
Public Shared Function IsCritical(ex As Exception) As Boolean
Return TypeOf ex Is OutOfMemoryException OrElse
TypeOf ex Is AppDomainUnloadedException OrElse
TypeOf ex Is AccessViolationException OrElse
TypeOf ex Is BadImageFormatException OrElse
TypeOf ex Is CannotUnloadAppDomainException OrElse
TypeOf ex Is ExecutionEngineException OrElse ' Obsolete one, but better to include
TypeOf ex Is InvalidProgramException OrElse
TypeOf ex Is System.Threading.ThreadAbortException
End Function
Usage:
Try
SomeMethod()
Catch ex As Exception When Not IsCritical(ex)
Console.WriteLine("Exception caught: " & ex.Message)
End Try
