这里有一些你可以尝试的方法:

If your solution contains more than one project, try building each project one at a time. (You may even want to try opening each project independently of the solution.) If applicable, ensure that all of your projects (including dependencies and tests) target the same version of the .NET Framework. (Thanks to user764754 for this suggestion!) Tip: Check Tools → Extension and Updates to ensure that your packages are up-to-date. Ensure that all dependency projects are built to target the same platform as your main project. Try restarting Visual Studio. As suggested by Bill Yang, try running Visual Studio as Administrator, if you aren't already. (If you are already running Visual Studio as Administrator, perhaps try the opposite?) Try restarting your computer. Try "Rebuild All". Run "Clean Solution", then remove your *vspscc* and *vssscc* files, restart Visual Studio, and then "Rebuild All". As suggested by Andy, close Visual Studio, delete the .suo file, and restart Visual Studio. As suggested by Arun Prasad E S, close Visual Studio, delete the .vs folder in your solution directory, and then re-open Visual Studio. (This folder is auto-generated by Visual Studio and contains cache, configuration settings, and more. More details can be found in these questions: Visual Studio - Deleting .vs folder and https://stackoverflow.com/q/48897191.) As suggested by MrMalith, close Visual Studio, delete the obj folder in your solution directory, clear your temporary folder, and then re-open Visual Studio.

只是为了完成并帮助将来再次遇到相同错误的人，我使用了Mahapps metro接口并更改了一个窗口的XAML，但忘记更改代码背后的部分类。在这种情况下，构建失败了，没有错误或警告，我能够通过增加设置输出的详细信息来找到它:

这里有一些你可以尝试的方法:

If your solution contains more than one project, try building each project one at a time. (You may even want to try opening each project independently of the solution.) If applicable, ensure that all of your projects (including dependencies and tests) target the same version of the .NET Framework. (Thanks to user764754 for this suggestion!) Tip: Check Tools → Extension and Updates to ensure that your packages are up-to-date. Ensure that all dependency projects are built to target the same platform as your main project. Try restarting Visual Studio. As suggested by Bill Yang, try running Visual Studio as Administrator, if you aren't already. (If you are already running Visual Studio as Administrator, perhaps try the opposite?) Try restarting your computer. Try "Rebuild All". Run "Clean Solution", then remove your *vspscc* and *vssscc* files, restart Visual Studio, and then "Rebuild All". As suggested by Andy, close Visual Studio, delete the .suo file, and restart Visual Studio. As suggested by Arun Prasad E S, close Visual Studio, delete the .vs folder in your solution directory, and then re-open Visual Studio. (This folder is auto-generated by Visual Studio and contains cache, configuration settings, and more. More details can be found in these questions: Visual Studio - Deleting .vs folder and https://stackoverflow.com/q/48897191.) As suggested by MrMalith, close Visual Studio, delete the obj folder in your solution directory, clear your temporary folder, and then re-open Visual Studio.

在我的情况下(VS 2019 v16.11.20)，禁用文本编辑器-> c# ->高级->在选项中启用“拉”诊断解决了这个问题。

删除隐藏的.vs文件夹并重新启动Visual Studio。这对我很管用。

我也遇到过类似的情况。在我的案例中，出现在csproj文件的BeforeBuild目标中的自定义操作(来自Nuget.org - http://www.nuget.org/packages/MSBuildVersioning/上提供的MSBuildVersioning包)失败了，没有在正常的地方触发任何错误消息。

我可以通过设置“MSBuild项目构建输出verbose”(在最新的Visual Studio的工具选项卡[路径:Tools > Options >构建和运行])为“诊断”来确定这一点，如下所示。这表明自定义操作(在我的例子中是HgVersionFile)失败了。