Wiring events to controls while the app is running To work around any limitation that you run into, just stop the debugger, and then complete the operation. The following are known limitations of XAML Hot Reload. When a delay occurs, a Hot Reload progress timer appears in Editor status bar. Be aware that some applications, such as those that use third-party toolkits, can experience significant delays with XAML Hot Reload. Setting the XAML_HOT_RELOAD_ACCURACY_OVER_PERF environment variable to 1 enables a more extensive search to update resource references and styles in WPF applications. Enable more thorough search to update resource references and styles in Visual Studio 2022 If your XAML file shows errors in the Error List, then XAML Hot Reload may not work. XAML Hot Reload is not supported in apps that run elevated/run as administrator. Ensure your program is not running elevated If you don't set the MSBuild property correctly, a custom build configuration name won't work, nor will a Release build. You must either manually set the correct MSBuild property to support XAML Hot Reload (see previous section), or you must use the default build configuration name (Debug). For example:įalse Verify that you're using the correct build configuration name For UWP, the property is DisableXbfLineInfo, which must be set to False. For WPF, the property is XamlDebuggingInformation, which must be set to True. It is controlled by MSBuild properties in your project files (such as *.csproj). Verify that your MSBuild properties are correctīy default, source info is included in a Debug configuration. To clean up, remove the variable when you are finished debugging. In the dialog box that opens, choose Environment Variables, then add it as a user variable, and set the value to 1. To set an environment variable, use the Start button to search for environment variable and choose Edit the system environment variables. If you want to use XAML Hot Reload with the Debug > Attach to Process command instead, then set the environment variable yourself. Visual Studio sets the value automatically as part of the Debug > Start Debugging (or F5) command. XAML Hot Reload requires that the environment variable ENABLE_XAML_DIAGNOSTICS_SOURCE_INFO is set to 1 at the time application starts. Verify that you use Start Debugging rather than Attach to Process Next, in the Options dialog box, make sure that the Enable XAML Hot Reload option is selected. If you don't see the in-app toolbar, then select Debug > Options > XAML Hot Reload from the Visual Studio menu bar. When you start debugging your app, make sure you see the in-app toolbar, which confirms that XAML Hot Reload is available. The feature is enabled by default in Visual Studio 2019 and later versions. If you see the message Hot Reload is not available in the in-app toolbar while debugging your app, follow the instructions described in this article to resolve the issue. For details on operating system and tooling requirements, see Write and debug running XAML code with XAML Hot Reload. XAML Hot Reload is supported for WPF and UWP apps. This troubleshooting guide includes detailed instructions that should resolve most issues that prevent XAML Hot Reload from working correctly. Applies to: Visual Studio 2019 and later versions
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