existing project in the same solution but can't debug it

Question

I have a dll . i add this dll as existing project to my web application ,so i can trace the code in it , i put a break point but it never hit this break point at all .

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affectedrows = DBUtilities.UpdateEntityWithTrans("aaa", ParamDictionary, KeyDictionary, DAL_Helper);

this line of code throw null reference exception and when i click f11 to enter this class which exist in the dll i added before to the solution , It doesn't enter this class to trace the exception.

Answer 1

You can't debug into lines of code for a referenced .dll, since it's compiled code. You'll need to add an actual source code project if you want to debug into it.

Answer 2

Sometimes happens. You add a reference to a project and you have still the reference at the compiled DLL. Please look at your project references list.