我遇到了同样的问题，并发现了问题-我在解决方案的构建配置管理器中未选中项目的构建复选框.

I had the same problem and discovered the problem - I had unchecked my project's build checkbox in the solution's build configuration manager.

要检查或解决此问题，请右键单击您的解决方案，选择配置管理器"，然后为您的项目选择生成"复选框.这样一来，您对项目中文件的任何更改都将在您运行应用程序或只是选择构建时强制重新构建.

To check or fix this, right click on your solution, select "Configuration Manager", and then select the "build" checkbox for your project. This will make it so any changes to files in your project will force a rebuild when you run the application or just choose to build.