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If you ever need a placeholder image, you don't need to create one, you can just use this url with the size of placeholder image you want:

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.

The .ForEach() It is very handy for shortening your code. Lets say you want to write a method which returns a list of MailAdress objects.

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

If you want to be able to generate random and realistic data for your program, there is a fantastic free resource called Mockaroo.