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This post gives you some examples of how you can check for errors when retrieving web.config app setting values.

Debugging errors can be difficult, especially when you need to see the errors inside the errors. This post shows you how you can get all errors as a collection of errors rather than them being hidden inside other errors. You can create an extension method like this one

Every now and again, there is a need to produce a list in a random order. I've found a very reliable way to do this using linq and the Guid class. It might sound complicated, but when you see the example, it should make sense and you should see how simple it is.

You may or may not be aware of the .ForEach() Method which is available on List<T> objects. It is very handy for shortening your code. Lets say you want to write a method which returns a list of MailAdress objects. A more traditional way would be to do the following:

Shorter code for using the value of a nullable object or another value if not.