About Chapter13——Declaring Delegate Types

Assessment

This issue has not been assessed yet.

Description

https://essentialcsharp.com/declaring-delegate-types#declaring-delegate-types

I am a bit confused about whether this code example is correct.
When I copy it into VS Code (with the C# extension), it triggers error CS1961.

Contributor guide

Open the contributing guide

First steps

1. Read the whole issue, then the project's contributing guide.
2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
3. Fork the repository and make your change on a branch.
4. Open a pull request that references the issue number.

More from IntelliTect/EssentialCSharp

• Page 81, immutability Open

  Difficulty 1/5 Under an hour Newbie friendliness 90/100

  IntelliTect/EssentialCSharp#886 · Opened Apr 28, 2026

• Page 72, compile warnig Open

  Difficulty 1/5 Under an hour Newbie friendliness 78/100

  IntelliTect/EssentialCSharp#885 · Opened Apr 28, 2026

• Page 69, UTF-8 String Literals Open

  Difficulty 1/5 Under an hour Newbie friendliness 90/100

  IntelliTect/EssentialCSharp#883 · 1 comment · Opened Apr 28, 2026

• Page 52 and page 58, minor errors Open

  Difficulty 1/5 Under an hour Newbie friendliness 72/100

  IntelliTect/EssentialCSharp#880 · Opened Apr 26, 2026

• Listing 2.20 and 2.21's code may need to be switched Open

  IntelliTect/EssentialCSharp#878 · 1 assignee · Opened Mar 28, 2026

All issues in IntelliTect/EssentialCSharp

Similar issues

• [quality-improver] Repository Quality: AzureFoundry Extension Missing from Self-Registration Acceptance Test Open
  type/automation type/tech-debt

  Difficulty 2/5 1-3 hours Newbie friendliness 78/100

  microsoft/testfx#11431 · Opened Sep 21, 2026

• [Bug]: Composite `ui screenshot` success output ignores `--quiet` Open
  bug

  Difficulty 2/5 1-3 hours Newbie friendliness 88/100

  microsoft/winappCli#914 · Opened Sep 21, 2026

• GeometryHelper.FlattenArc / FlattenCubicBezier / FlattenQuadraticBezier emit a NaN point when the segment count truncates to 0 (0/0) — a Path with a sub-pixel arc fail-fasts Windows with D2DERR_BAD_NUMBER (root cause of #8512, #13757) Open
  t/bug

  Difficulty 2/5 1-3 hours Newbie friendliness 82/100

  dotnet/maui#38751 · 1 reaction · Opened Sep 21, 2026

• [CI Failure] Flaky: MauiBuildQueueTests.CancelQueuedResource_CompletesGracefullyAndDoesNotAcquireSemaphore asserts exact exception type but sometimes gets TaskCanceledException instead of OperationCanceledException Open
  ci-failure-cause test-failure

  Difficulty 2/5 1-3 hours Newbie friendliness 82/100

  microsoft/aspire#20284 · Opened Sep 21, 2026

• The login flow's text-link submit is 42 px tall on a narrow screen; its docblock says 44 Open
  area:auth FE mvp P3

  Difficulty 2/5 1-3 hours Newbie friendliness 88/100

  klasolsson81/jobbliggaren#1788 · Opened Sep 21, 2026

More C# issues