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Always accessing array.Length is defensively coding. In the event your array is mutated, always accessing array.Length ensures you won't run into an Index Out of Bounds exception.

Even better is to just avoid accessing the array's length. I almost always use foreach or Linq.

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That is orders of magnitude slower and allocates. Of course you can use: https://github.com/jackmott/LinqFaster

I write first for readability and performance second. Not to say that performance isn't important (and of course I pay attention to O notation), but throwing a little more memory and CPU power at a web page is far cheaper and easier than spending developer time reading code.

Wrong

From the article:

> It also turned out that Foreach often walks through the array faster than For

1. `ForEach` is slower. 2. `foreach` is faster. 3. Linq is slower.

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