Skip to content

Emphasize about same anonymous types not being equal when from separate assemblies #38421

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Nov 27, 2023
Merged

Emphasize about same anonymous types not being equal when from separate assemblies #38421

Show file tree
Hide file tree
Changes from 2 commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
434c5ea
Add note to anonymous types equality regarding separate assemblies
BartoszKlonowski Nov 23, 2023
b8c3732
Add anonymous types to default access table and link to it
BartoszKlonowski Nov 23, 2023
51272d9
Update docs/csharp/fundamentals/types/anonymous-types.md
BillWagner Nov 27, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions docs/csharp/fundamentals/types/anonymous-types.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,10 @@ You cannot declare a field, a property, an event, or the return type of a method

Because the <xref:System.Object.Equals%2A> and <xref:System.Object.GetHashCode%2A> methods on anonymous types are defined in terms of the `Equals` and `GetHashCode` methods of the properties, two instances of the same anonymous type are equal only if all their properties are equal.

> [!NOTE]
> The [default accessibility level](../../programming-guide/classes-and-structs/access-modifiers.md#default-access-summary-table) of an anonymous type is `internal`, hence two anonymous types defined in different assemblies are not of the same type.
> Therefore instances of anonymous types can't be equal to each other when defined in different assemblies, even when having all their properties equal.

Anonymous types do override the <xref:System.Object.ToString%2A> method, concatenating the name and `ToString` output of every property surrounded by curly braces.

```
Expand Down
2 changes: 2 additions & 0 deletions docs/csharp/programming-guide/classes-and-structs/access-modifiers.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,7 @@ Delegates behave like classes and structs. By default, they have `internal` acce
| `record` | internal |
| `enum` | internal |
| `interface` members | public |
| Anonymous types | internal |
| [class, record, and struct members](./members.md) | private |

For more details see the [Accessibility Levels](../../language-reference/keywords/accessibility-levels.md) page.
Expand All @@ -103,3 +104,4 @@ For more details see the [Accessibility Levels](../../language-reference/keyword
- [class](../../language-reference/keywords/class.md)
- [struct](../../language-reference/builtin-types/struct.md)
- [interface](../../language-reference/keywords/interface.md)
- [Anonymous types](../../fundamentals/types/anonymous-types.md)