我最近安装了VS 2022，并打开了一个我正在处理的项目，该项目已经创建并在VS 2019上运行良好。
当使用VS 2022并尝试访问应用程序的属性窗口时，我得到以下错误：
=====================
09/09/2022 08:18:28
Recoverable
Microsoft.VisualStudio.ProjectSystem.Query.QueryExecutionException: '>' is an unexpected token. The expected token is '='. Line 9, position 16. ---> System.Xml.XmlException: '>' is an unexpected token. The expected token is '='. Line 9, position 16.
at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ParseAttributes()
at System.Xml.XmlTextReaderImpl.ParseElement()
at System.Xml.XmlTextReaderImpl.ParseElementContent()
at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r)
at System.Xml.Linq.XContainer.ReadContentFrom(XmlReader r, LoadOptions o)
at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)
at System.Xml.Linq.XDocument.Load(TextReader textReader, LoadOptions options)
at Microsoft.VisualStudio.ProjectSystem.VS.WindowsForms.MyAppDocument..ctor(DocData docData)
at Microsoft.VisualStudio.ProjectSystem.VS.WindowsForms.MyAppFileAccessor.<TryGetMyAppFileAsync>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.WindowsForms.MyAppFileAccessor.<GetStringPropertyValueAsync>d__20.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.WindowsForms.MyAppFileAccessor.<GetBooleanPropertyValueAsync>d__21.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.WindowsForms.MyAppFileAccessor.<GetEnableVisualStylesAsync>d__31.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.Properties.ApplicationFrameworkValueProvider.<GetPropertyValueAsync>d__32.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.Properties.InterceptedProjectProperties.<GetUnevaluatedPropertyValueAsync>d__3.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.VisualStudio.ProjectSystem.PropertyPages.PageProperty.<GetUnevaluatedValueFromDataSourceAsync>d__41.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Query.UIPropertyValueDataProducer.<CreateUIPropertyValueValueAsync>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Query.UIPropertyValueDataProducer.<CreateUIPropertyValueValueAsync>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at Microsoft.VisualStudio.ProjectSystem.VS.Query.UIPropertyValueDataProducer.<CreateUIPropertyValueValuesAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Query.QueryDataFromProviderStateProducerBase`1.<SendRequestAsync>d__0.MoveNext()
--- End of inner exception stack trace ---
at Microsoft.VisualStudio.ProjectSystem.Query.QueryExecution.QuerySubscription`1.<RunQueryOnceAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.Query.QueryExecution.QuerySubscription`1.<>c__DisplayClass8_0.<<Start>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.PropertyPages.Designer.ProjectPropertyDataAccess.Observer.<InitializeAsync>d__10.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.PropertyPages.Designer.ProjectPropertyDataAccess.Observer.<CreateAsync>d__9.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.PropertyPages.Designer.ProjectPropertiesEditor.<>c__DisplayClass0_0.<<-ctor>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Microsoft.VisualStudio.ProjectSystem.VS.Implementation.PropertyPages.Designer.AsyncLoadContent.<>c__DisplayClass0_0.<<Initialize>b__0>d.MoveNext()
===================
我在其他线程上尝试了各种建议，用户无法访问他们的解决方案的属性，比如：
- 禁用所有扩展，重新启动VS
- 重新启用所有扩展，重新启动VS
- 删除
%AppData%MicrosoftVisualStudio文件夹并重新启动VS - 重新创建
%AppData%MicrosoftVisualStudio文件夹后，再次将其删除，并以管理员身份运行VS 2022 - 我没有在任务栏上右键单击VS 2022并单击要打开的项目，而是尝试直接从.sln文件打开它
- 还尝试打开VS 2022并转到文件>打开>项目/解决方案，找到我的项目并以这种方式打开
以上所有操作均无效。
我需要在VS 2022中重新创建这个项目才能工作吗？或者有人知道这个错误并在过去解决了它，可以分享他们的信息吗？
我在将.NET Framework WinForms项目转换为.NET 6 WinForms项目后发现此错误。我发现升级助手已将<UseWPF>true</UseWPF>添加到项目文件中。
删除此项修复了问题。