The number of people who don't understand when to use a list/array VS dictionary/hash table vs lookup object is too damn high. A huge amount of basic optimizati

The number of people who don't understand when to use a list/array VS dictionary/hash table vs lookup object is too damn high. A huge amount of basic optimization is constantly at their fingertips and they nearly always choose to make a list/array and use linq to join/merge multiple relational data sets instead of optimized standard objects.