C# Class Library Error Handling
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Standard Exception Types Designing Custom Exceptions Exceptions and Performance TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Exception Handling Visual Studio 2010 Other Versions Visual Studio 2008 .NET error handling in c# best practices Framework 3.5 .NET Framework 3.0 .NET Framework 2.0 The following guidelines help ensure that your library handles exceptions appropriately.Do not handle errors by catching non-specific exceptions, such as System.Exception, System.SystemException, and so on, in framework code.You can catch exceptions when the purpose of catching the exception is to re-throw or transfer the exception to a different thread. The following code example demonstrates incorrect exception handling. C#C++VB Copy public class BadExceptionHandlingExample1 { public void DoWork() { // Do some work that might throw exceptions. } public void MethodWithBadHandler() { try { DoWork(); } catch (Exception e) { // Handle the exception and // continue executing. } } } Avoid handling errors by catching non-specific exceptions, such as System.Exception, System.SystemException, and so on, in application code. There are cases when handling errors in applications is acceptable, but such cases are rare.An application should not handle exceptions that can result in an unexpected or exploitable state. If you cannot predict all possible causes of an exception and ensure that malicious code cannot exploit the resu
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of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up C# Class Library Exception Handling up vote 2 down vote favorite 1 Can I do this in https://msdn.microsoft.com/en-us/library/ms229005(v=vs.100).aspx a c# class library to handle exceptions that may occur during the execution of a class library code itself? I'm new in writing class libraries and exception handling within it. Please advice. private void MethodName(String text) { try { .............. .............. .............. } catch (Exception ex) { throw new Exception(ex.Message.ToString()); } } I've searched in google and stackoverflow, but did not find any article whether I'm allowed to handle exceptions in class http://stackoverflow.com/questions/16093905/c-sharp-class-library-exception-handling libraries this way or if it is not a recommended way to do it. But it works. May be a dumb question, but I have this doubt. Thanks. c# exception-handling class-library share|improve this question asked Apr 18 '13 at 22:05 Vinay Sathyanarayana 185217 6 Why do you want to catch an exception just to throw it away again? Do something useful or don't catch it. –Tim Schmelter Apr 18 '13 at 22:06 2 If you code things that way, it will be difficult for a caller to do anything meaningful with any exceptions produced by the code you're calling. Is that your intention? –supercat Apr 18 '13 at 22:08 4 And if you do decide to rethrow it, use just throw;. In the example you posted here, you completely hide all the root causes of the failure. If you wish, you could create/throw a general MyClassLibraryException which has the root exception as its InnerException –Chris Sinclair Apr 18 '13 at 22:08 1 @VinaySathyanarayana In that case just have try {} catch (Exception ex) { LogMyException(ex); throw; } –Chris Sinclair Apr 18 '13 at 22:09 2 Seriously you'll be making a nightmare of debugging for yourself if you proceed along this route. If you have some bug in yo
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more http://stackoverflow.com/questions/17872620/a-global-error-handler-for-a-class-library-in-c-sharp about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up A global error handler for a class library in C# up vote error handling 3 down vote favorite Is there a way to catch and handle an exception for all exceptions thrown within any of the methods of a class library? I can use a try catch construct within each method as in sample code below, but I was looking for a global error handler for a class library. The library could be used by ASP.Net or Winforms apps or another class library. c# error handling The benefit would be easier development, and no need to repeatedly do the same thing within each method. public void RegisterEmployee(int employeeId) { try { .... } catch(Exception ex) { ABC.Logger.Log(ex); throw; } } c# error-handling class-library share|improve this question asked Jul 26 '13 at 3:53 Sunil 5,342124894 You can use ContextBoundObject –Mad Hollander Jul 26 '13 at 4:04 Can you share some sample code, but only if you have it? Thanks –Sunil Jul 26 '13 at 4:08 add a comment| 1 Answer 1 active oldest votes up vote 3 down vote accepted You can subscribe to global event handler like AppDomain.UnhandledException and check the method that throws exception: AppDomain.CurrentDomain.UnhandledException += CurrentDomainOnUnhandledException; private static void CurrentDomainOnUnhandledException(object sender, UnhandledExceptionEventArgs unhandledExceptionEventArgs) { var exceptionObject = unhandledExceptionEventArgs.ExceptionObject as Exception; if (exceptionObject == null) return; var assembly = exceptionObject.TargetSite.DeclaringType.Assembly; if (assembly == //your code) { //Do something } } share|improve this answer answered Jul 26 '13 at 4:21 Vyacheslav Volkov 2,7151714 Just curious. Would this involve reflection when getting exceptionObject.TargetSite.DeclaringType.Assembly? –Sunil Jul 26 '13 at 6:07 The TargetSite property returns the method of MethodBase type that throws the current exception. The MethodBase type is a part of reflection library and it follo