IEnumerable implicitly offers early termination. LINQ expressions are always implicit by default, so .Select(...).Take(n) will stop after taking N items. It's j

IEnumerable implicitly offers early termination. LINQ expressions are always implicit by default, so .Select(...).Take(n) will stop after taking N items. It's just like a foreach loop (same interface/API). For the same reason, if you 'foreach' over the result of a linq query multiple times, it will evaluate the whole sequence again, which often isn't what you want - so people tend to call .ToArray() or .ToList() at the end to fully evaluate it once.