Skip to main content

Limitations

Asynchronous methods that report progress​

There are two types of asynchronous methods that report progress:

  • Methods that do not have a result object but report progress to callback listeners (see the IAsyncActionWithProgress interface).
  • Methods that have a result object and also report progress to callback listeners (see the IAsyncOperationWithProgress interface).
caution

It's worth noting that neither of these are currently supported, and supporting them would require a significant amount of effort and may require the introduction of new language features. As a result, support for these is unlikely to be available in the near future.

Events​

WinRT events are used to notify interested parties when something of significance happens. An event is defined as a pair of add/remove listener methods with matching name and delegate type.

For example, the NetworkInformation class has an event called NetworkStatusChanged, which is triggered when the network status changes for a connection.

caution

However, WinRT events are not supported yet, and supporting them would require a significant amount of effort and may require the introduction of new language features. As a result, support for WinRT events is unlikely to be available in the near future.

Unsupported WinRT APIs​

Although you can use most WinRT APIs in your app, there are two main sets of WinRT APIs that aren't supported, or have restrictions:

  • APIs that have dependencies on user interface (UI) features that were designed for use only in a Universal Windows Platform (UWP) app.
  • APIs that require package identity. Such APIs are supported only in apps that are packaged using MSIX.
info

Please refer to the Windows Runtime APIs not supported in desktop apps page for more information.