Unhandled exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.   at Microsoft.DotNet.Tools.Uninstall.Windows.RegistryQuery.IsDotNetCoreBundle(RegistryKey registryKey)   at Microsoft.DotNet.Tools.Uninstall.Windows.RegistryQuery.<>c.<GetAllInstalledBundles>b__1_1(RegistryKey bundle)   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()   at System.Linq.Enumerable.WhereEnumerableIterator`1.ToList()   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)   at Microsoft.DotNet.Tools.Uninstall.Windows.RegistryQuery.GetAllInstalledBundles()   at Microsoft.DotNet.Tools.Uninstall.Shared.Commands.ListCommandExec.Execute(IBundleCollector bundleCollector)   at Microsoft.DotNet.Tools.Uninstall.Shared.Configs.CommandLineConfigs.<>c__DisplayClass40_0.<.cctor>b__4()   at Microsoft.DotNet.Tools.Uninstall.Shared.Exceptions.ExceptionHandler.<>c__DisplayClass0_0.<HandleException>b__0()   --- End of inner exception stack trace ---   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)   at System.Delegate.DynamicInvokeImpl(Object[] args)   at System.Delegate.DynamicInvoke(Object[] args)   at System.CommandLine.Invocation.ModelBindingCommandHandler.InvokeAsync(InvocationContext context)   at System.CommandLine.Invocation.InvocationPipeline.<>c__DisplayClass4_0.<<BuildInvocationChain>b__0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Invocation.InvocationExtensions.<>c.<<UseParseErrorReporting>b__22_0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Invocation.InvocationExtensions.<>c__DisplayClass8_0.<<UseTypoCorrections>b__0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Invocation.InvocationExtensions.<>c.<<UseSuggestDirective>b__7_0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Invocation.InvocationExtensions.<>c.<<UseParseDirective>b__6_0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Invocation.InvocationExtensions.<>c.<<UseHelp>b__20_0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass4_0.<<UseVersionOption>b__0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Invocation.InvocationExtensions.<>c.<<RegisterWithDotnetSuggest>b__23_0>d.MoveNext()--- End of stack trace from previous location where exception was thrown ---   at System.CommandLine.Invocation.InvocationExtensions.<>c__DisplayClass5_0.<<UseExceptionHandler>b__0>d.MoveNext()

.NET Core SDK（反映任何 global.json）: Version:   3.1.101 Commit:    b377529961运行时环境: OS Name:     Windows OS Version:  10.0.18363 OS Platform: Windows RID:         win10-x64 Base Path:   C:\Program Files\dotnet\sdk\3.1.101\Host (useful for support):  Version: 3.1.1  Commit:  a1388f194c.NET Core SDKs installed:  3.1.101 [C:\Program Files\dotnet\sdk].NET Core runtimes installed:  Microsoft.AspNetCore.All 2.1.15 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]  Microsoft.AspNetCore.App 2.1.15 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]  Microsoft.AspNetCore.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]  Microsoft.NETCore.App 2.1.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]  Microsoft.NETCore.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]  Microsoft.WindowsDesktop.App 3.1.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]To install additional .NET Core runtimes or SDKs:  https://aka.ms/dotnet-download