323d28c220
When finding an enumerator for the given code:
```cs
var collection = new NSSet<NSNumber> ();
foreach (var item in collection) {
// ...
}
```
the C# compiler will first look for any `GetEnumerator` methods. The non-generic `NSSet` class defines a `IEnumerator<NSObject> GetEnumerator<NSObject> ()` method, which, since the generic `NSSet<T>` class doesn't define such a method, is selected.
The end result is that the type of the foreach element is `NSObject`
(`GetEnumerator`'s return type') - which is somewhat unexpected:
```cs
var collection = new NSSet<NSNumber> ();
foreach (var item in collection) {
Console.WriteLine (item.LongValue); // error CS1061: 'NSObject' does not contain a definition for 'LongValue'
}
```
The fix is to define a `IEnumerator<T> GetEnumerator<T> ()` method in the
generic `NSSet<T>` class, which the C# will find and choose over the base
class' method. Then the type of the foreach element is the correct type, and
the following code works:
```cs
var collection = new NSSet<NSNumber> ();
foreach (var item in collection) {
Console.WriteLine (item.LongValue); // it works!
}
```
Do this for all our generic collection classes.
Also document these methods + all the other public `GetEnumerator` methods.
|
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|---|---|---|
| .config | ||
| .github | ||
| Localize | ||
| builds | ||
| docs | ||
| dotnet | ||
| eng | ||
| external | ||
| fsharp | ||
| jenkins | ||
| mk | ||
| mono | ||
| msbuild | ||
| release | ||
| runtime | ||
| src | ||
| tests | ||
| tools | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .gitmodules | ||
| CODEOWNERS | ||
| DOWNLOADS.md | ||
| Directory.Build.props | ||
| ISSUE_TEMPLATE.md | ||
| LICENSE | ||
| Make.config | ||
| Make.versions | ||
| Makefile | ||
| NOTICE.txt | ||
| NuGet.config | ||
| README.md | ||
| SECURITY.MD | ||
| Versions-ios.plist.in | ||
| Versions-mac.plist.in | ||
| Xamarin.Mac.sln | ||
| Xamarin.iOS.sln | ||
| banner.png | ||
| configure | ||
| create-make-config.sh | ||
| global.json | ||
| mac-entitlements.plist | ||
| product.snk | ||
| system-dependencies.sh | ||
| versions-check.csharp | ||
README.md
.NET for iOS, Mac Catalyst, macOS, tvOS
Welcome!
This module is the main repository for:
- .NET for iOS
- .NET for Mac Catalyst
- .NET for macOS
- .NET for tvOS
These SDKs allow us to create native iOS, Mac Catalyst, macOS and tvOS applications using the same UI controls we would in Objective-C and Xcode, except with the flexibility and elegance of a modern language (C#), the power of the .NET Base Class Library (BCL), and first-class IDEs and editors—Visual Studio and Visual Studio Code—at our fingertips.
This repository is where we do development for the .NET for iOS, Mac Catalyst, macOS, and tvOS SDKs. .NET for iOS, Mac Catalyst, macOS, and tvOS are part of .NET MAUI, and may also be used independently for native iOS and macOS development with .NET.
There are a few ways that you can contribute, for example:
- Submit bugs and feature requests
- Review source code changes
- Submit pull requests to resolve issues and fix bugs
Support
.NET for iOS, Mac Catalyst, macOS, and tvOS are part of .NET MAUI, since it was introduced in May 2022 as part of .NET 6, and is currently supported as described on the .NET MAUI Support Policy.
Support for Xamarin.iOS and Xamarin.Mac ended on May 1, 2024 as per the Xamarin Support Policy:
Xamarin support ended on May 1, 2024 for all Xamarin SDKs including Xamarin.Forms. Android API 34 and Xcode 15 SDKs (iOS and iPadOS 17, macOS 14) are the final versions Xamarin targets from existing Xamarin SDKs (i.e. no new APIs are planned).
Contributing
If you are interested in fixing issues and contributing directly to the code base, please see the document How to Contribute, which covers the following:
- How to build and run from source
- The development workflow, including debugging and running tests
- Coding Guidelines
- Submitting pull requests
Downloads
The preferred method for installing Xamarin.iOS and Mac is to use the Visual Studio installers (Windows, Mac).
The team also strongly recommends using the latest Xamarin SDK and Xcode whenever possible.
However, we provide links to older Xamarin.iOS and Mac packages for macOS downgrades and build machine configuration, see Downloads.
Feedback
- Ask a question on Stack Overflow or the Xamarin Forums
- Request a new feature on GitHub
- Vote on existing feature requests
- Submit bugs to GitHub Issues
- Discuss development and design on Discord
License
Copyright (c) .NET Foundation Contributors. All rights reserved. Licensed under the MIT License.