我使用 Visual Studio 社区使用 win10sdk 在我的系统上安装了 winui3。 我启动一个空白的 C# WinUI 应用程序，并在构建时收到此错误。 我什至没有写过任何代码。我已经修复了 IDE
IDE信息
Microsoft Visual Studio Community 2022
Version 17.9.6
VisualStudio.17.Release/17.9.6+34728.123
Microsoft .NET Framework
Version 4.8.09032
Installed Version: Community
Visual C++ 2022 00482-90000-00000-AA065
Microsoft Visual C++ 2022
ASP.NET and Web Tools 17.9.199.22661
ASP.NET and Web Tools
Azure App Service Tools v3.0.0 17.9.199.22661
Azure App Service Tools v3.0.0
Better Comments BetterComments.Omar Rwemi.e985519f-8696-40b7-9400-807054b4ec76
Better Comments is a Visual Studio extension that gives you the ability to customize the font and opacity of your comments independently of the editor's font settings. It also adds four additional comment classifications, each classification with its own customizable foreground.
C# Tools 4.9.0-3.24121.1+a98c90d56455379836dd5c845b35fa932b00cfa3
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.
GitHub Copilot 1.147.0.0 (v1.147.0.0@218a5ecac)
GitHub Copilot is an AI pair programmer that helps you write code faster and with less work.
GitHub Copilot Agent 1.147.0
Linux Core Dump Debugging 1.0.9.34714
Enables debugging of Linux core dumps.
Microsoft JVM Debugger 1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines
NuGet Package Manager 6.9.2
NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/
TypeScript Tools 17.0.30103.2001
TypeScript Tools for Microsoft Visual Studio
Visual Basic Tools 4.9.0-3.24121.1+a98c90d56455379836dd5c845b35fa932b00cfa3
Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.
Visual C++ for Linux Development 1.0.9.34714
Visual C++ for Linux Development
Visual F# Tools 17.9.0-beta.23614.3+a521e1cd420beb56c15faf6836184fadd2b7937a
Microsoft Visual F# Tools
Visual Studio IntelliCode 2.2
AI-assisted development for Visual Studio.
我希望像往常一样看到一个空白的应用程序窗口
我遇到错误
Severity Code Description Project File Line Suppression State
Error XLS0414 The type 'Application' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built. App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App.xaml 2
Error XLS0414 The type 'Application' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built. App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App.xaml 7
Error XLS0414 The type 'ResourceDictionary' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built. App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App.xaml 8
Error XLS0414 The type 'ResourceDictionary' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built. App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App.xaml 9
Error XLS0414 The type 'XamlControlsResources' was not found. Verify that you are not missing an assembly reference and that all referenced assemblies have been built. App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App.xaml 10
Warning NU1603 App1 depends on Microsoft.Windows.SDK.BuildTools (>= 10.0.22621.755) but Microsoft.Windows.SDK.BuildTools 10.0.22621.755 was not found. An approximate best match of Microsoft.Windows.SDK.BuildTools 10.0.22621.756 was resolved. App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.WindowsAppSDK. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.NETCore.App.Runtime.win-x86. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.Windows.SDK.NET.Ref. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.AspNetCore.App.Runtime.win-x86. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.NETCore.App.Runtime.win-arm64. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.AspNetCore.App.Runtime.win-x64. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.WindowsDesktop.App.Runtime.win-arm64. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.WindowsDesktop.App.Runtime.win-x64. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.AspNetCore.App.Runtime.win-arm64. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.NETCore.App.Runtime.win-x64. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
Error NU1101 Unable to find package Microsoft.WindowsDesktop.App.Runtime.win-x86. No packages exist with this id in source(s): Microsoft Visual Studio Offline Packages App1 C:\Users\hp\Desktop\Scripts\C#\App1\App1\App1.csproj 1
我已经安装了win10SDK，桌面开发支持并在我的设置中启用了开发者模式
似乎所需的 NuGet 包安装失败。
转到 Options >> NuGet Package Manager >> Package Sources 并确保您有以下源：
Name: nuget.org
Source: https://api.nuget.org/v3/index.json
构建应用程序时，将自动下载所需的 NuGet 包，但您需要互联网连接。