Example<\/h2>\n
Let\u2019s take a look at the small C++ code sample below (the full source is attached<\/a>). In this example we have a series of classes, each of which contains a pointer to another class, and one function named GetHelloWorld()<\/span>. In the main()method we dereference all of the pointers in order to print \u201cHello World\u201d.<\/p>\n int<\/span> main()\n<\/span>{\n<\/span>\u00a0\u00a0 ClassA<\/span>* A = new ClassA<\/span>();\n<\/span>\u00a0\u00a0 printf(A-> B-> C-> D-> GetHelloWorld());\n<\/span>\u00a0\u00a0 return<\/span> 0;\n<\/span>}<\/span><\/p><\/blockquote>\n When I run this simple demo I get an exception for an access violation on the line printf(A-> B-> C-> D-> GetHelloWorld());<\/span> I know that something on this line must be causing the access violation. But what? With prior versions of Visual Studio, I would have to investigate further into the code to figure that out. Now with VS 2015 Update 1, all I have to do is look at the message in the Exception Dialog that pops up. The debugger tells me that a read access violation occurred and that A->B was nullptr.<\/p>\n Now I can break into my code knowing exactly what part of the chained line caused the access violation and can fix the issue.<\/p>\n Install Visual Studio 2015 Update 1 RC<\/a> today, and try out this new feature. We are aware this functionality is highly desirable for .NET debugging as well. We\u2019re working on it, but can\u2019t promise when it will be available. Please vote for and comment on this UserVoice item<\/a> and provide your feedback. As always, we welcome feedback with open ears so please let me know what you think in the comments section below, through Visual Studio\u2019s Send a Smile tool<\/a>, or via Twitter<\/a>.<\/p>\n![\"NullReference\"](\"https:\/\/devblogs.microsoft.com\/devops\/wp-content\/uploads\/sites\/6\/2015\/10\/1007.NullReference_thumb_0A6CBFFD.png\" "\\"NullReference\\"")
<\/a><\/p>\nWrap up<\/h2>\n