How many programmers you know use ‘yield‘? Seriously, if you have an occasion, ask them – I’m afraid you will notice a strange thing – everybody heard about it but (almost) nobody (including me) uses it. Time to change it! Why? Because ‘yield‘ was introduced in C# 2.0 (yeeeah, it’s that old!) and can help you get rid of some of the ‘temp’ collections in your code and, what’s more important, it may prevent you from System.OutOfMemory exception.