Errata

Code says 'for (int i = 1; i < 100_000; ++i)' but text says 'This adds together the numbers from 1 to 100,000'. Shouldn't the code be 'i <= 100_000' to match the text? The code will only go to 99_999

'it will accept any expression on which you can invoke a GetWaiter method to obtain a suitable type'. Outside a restaurant context, GetAwaiter might be more appropriate

The text says "Example 2-18 exploits this to evaluate the quadratic formula (the standard way to solve quadratic equations)" and then shows "double x = (-b + Math.Sqrt(b * b - 4 * a * c)) / (2 * a);" but neglects to qualify that this is only half of the "standard" way - the standard way is: (-b then + or - then Math.Sqrt(b * b - 4 * a * c)) / (2 * a) ... there are always 2 solutions. So the current text is slightly misleading, implying the standard way gives 1 solution.

Text could be changed to "Example 2-18 exploits this to evaluate one solution to the quadratic formula"

“The TypeInfo class also provides methods to discover related reflection objects. (The properties in this paragraph are all defined on TypeInfo, not Type. As previously discussed, this is just an accident of when they were defined.) Most of these come in two forms: one where you want a complete list of all the items of the specified kind and one where you know the name of the thing you’re
looking for. For example, we have DeclaredConstructors, DeclaredEvents, DeclaredFields, DeclaredMethods, DeclaredNestedTypes, and DeclaredProperties along with their counterparts,
GetDeclaredConstructor, GetDeclaredEvent, GetDeclaredField,
GetDeclaredMethod, GetDeclaredNestedType, and GetDeclaredProperty.
”

There is no GetDeclaredConstructor in TypeInfo class.