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Add items for pages 258 and 277

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Mark J Price 2023-02-03 09:51:47 +00:00
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docs/errata/README.md
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@ -2,7 +2,7 @@
If you find any mistakes in the seventh edition, *C# 11 and .NET 7 - Modern Cross-Platform Development Fundamentals*, or if you have suggestions for improvements, then please [raise an issue in this repository](https://github.com/markjprice/cs11dotnet7/issues) or email me at markjprice (at) gmail.com.
[**Errata** (23 items)](errata.md): Typos, tool user interface changes, or mistakes in code that would cause a compilation error that prevents a successful build.
[**Errata** (25 items)](errata.md): Typos, tool user interface changes, or mistakes in code that would cause a compilation error that prevents a successful build.
[**Improvements** (4 items)](improvements.md): Changes to text or code that would improve the content. These are optional.

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docs/errata/errata.md
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**Errata** (23 items)
**Errata** (25 items)
If you find any mistakes, then please [raise an issue in this repository](https://github.com/markjprice/cs11dotnet7/issues) or email me at markjprice (at) gmail.com.
@ -16,8 +16,10 @@ If you find any mistakes, then please [raise an issue in this repository](https:
- [Page 185 - Creating a class library that needs testing](#page-185---creating-a-class-library-that-needs-testing)
- [Page 188 - Running unit tests using Visual Studio Code](#page-188---running-unit-tests-using-visual-studio-code)
- [Page 244 - Init-only properties](#page-244---init-only-properties)
- [Page 258 - Defining and handling events](#page-258---defining-and-handling-events)
- [Page 272 - Defining struct types](#page-272---defining-struct-types)
- [Page 275 - Releasing unmanaged resources](#page-275---releasing-unmanaged-resources)
- [Page 277 - Making a value type nullable](#page-277---making-a-value-type-nullable)
- [Page 322 - Revealing the location of a type](#page-322---revealing-the-location-of-a-type)
- [Page 330 - Publishing a self-contained app, Page 354 - Exercise 7.3 – Explore PowerShell](#page-330---publishing-a-self-contained-app-page-354---exercise-73--explore-powershell)
- [Page 412 - Compressing streams](#page-412---compressing-streams)
@ -165,6 +167,19 @@ In Step 1, the project name `CalculatorLibUnitTest` should be `CalculatorLibUnit
In Step 1, I say to add a new file named `Records.cs` to the `PacktLibraryNetStandard2` project/folder. I should have said to the `PacktLibraryModern` project/folder.
# Page 258 - Defining and handling events
> Thanks to [Ricky](https://github.com/r1c5) for raising this [issue on 2 February 2023](https://github.com/markjprice/cs11dotnet7/issues/23).
In Step 5, the statement that outputs the "Stop it!" message uses the `$` string interpolation prefix character unnecessarily, as shown in the following code:
```cs
WriteLine($"Stop it!");
```
The `$` can be removed, as shown in the following code:
```cs
WriteLine("Stop it!");
```
# Page 272 - Defining struct types
> Thanks to [Ali Koleiny Zadeh](https://github.com/alikzalikz) for raising this [issue on 15 January 2023](https://github.com/markjprice/cs11dotnet7/issues/18).
@ -179,6 +194,20 @@ In the second bullet point after the large code block, I wrote, "It needs to che
It might be clearer if I wrote, "It needs to check the `disposing` parameter and `disposed` field because if the finalizer thread has already run and it called the `~ObjectWithUnmanagedResources` method, then unmanaged resources will already have been deallocated and only managed resources remain to be deallocated by the garbage collector." I will do this in the next edition.
# Page 277 - Making a value type nullable
> Thanks to [Ricky](https://github.com/r1c5) for raising this [issue on 2 February 2023](https://github.com/markjprice/cs11dotnet7/issues/24).
In Step 6, the output should be formatted with a black background like other command-line blocks, and the output is missing the writing of the variable named `thisCannotBeNull`. The output should be:
```
4
0
7
7
```
Step 7 should therefore say, "The **second** line is blank because it is outputting the null value!", and it should not be formatted as a numbered step because it is a not an instruction to the reader, it is a note.
# Page 322 - Revealing the location of a type
> Thanks to Bob Molloy for raising this issue via email.