I have core 2.0 project as Target Framework but the SDK is 2.1 amd i am getting this exception in Microsoft.AspNetCore.Builder.MvcApplicationBuilderExtensions.UseMvc.

I can see that it got something to do with System.Memory version which i am using. Please suggest the issue and the possible workaround.

• Exception Message [Specified argument was out of the range of valid values.]

### - Exception Source [System.Private.CoreLib]

### - Exception StackTrace [ at System.ReadOnlySpan`1..ctor(Void* pointer, Int32 length)

at Interop.Sys.DirectoryEntry.GetName(Span1 buffer) at System.IO.Enumeration.FileSystemEntry.get_FileName() at System.IO.Enumeration.FileSystemEntry.get_FullPath() at System.IO.Enumeration.FileSystemEntry.Initialize(FileSystemEntry& entry, DirectoryEntry directoryEntry, ReadOnlySpan1 directory, ReadOnlySpan1 rootDirectory, ReadOnlySpan1 originalRootDirectory, Span1 pathBuffer) at System.IO.Enumeration.FileSystemEnumerator1.MoveNext()
at System.IO.FileSystemWatcher.RunningInstance.AddDirectoryWatchUnlocked(WatchedDirectory parent, String directoryName)
at System.IO.FileSystemWatcher.RunningInstance.AddDirectoryWatchUnlocked(WatchedDirectory parent, String directoryName)
at System.IO.FileSystemWatcher.RunningInstance..ctor(FileSystemWatcher watcher, SafeFileHandle inotifyHandle, String directoryPath, Boolean includeSubdirectories, NotifyFilters notifyFilters, CancellationToken cancellationToken)
at System.IO.FileSystemWatcher.StartRaisingEvents()
at System.IO.FileSystemWatcher.StartRaisingEventsIfNotDisposed()
at System.IO.FileSystemWatcher.set_EnableRaisingEvents(Boolean value)
at Microsoft.Extensions.FileProviders.Physical.PhysicalFilesWatcher.TryEnableFileSystemWatcher()
at Microsoft.Extensions.FileProviders.Physical.PhysicalFilesWatcher.CreateFileChangeToken(String filter)
at Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionDescriptorChangeProvider.GetChangeToken()
at Microsoft.Extensions.Primitives.ChangeToken.OnChange(Func1 changeTokenProducer, Action changeTokenConsumer) at Microsoft.AspNetCore.Mvc.Internal.ActionDescriptorCollectionProvider..ctor(IEnumerable1 actionDescriptorProviders, IEnumerable1 actionDescriptorChangeProviders) --- End of stack trace from previous location where exception was thrown --- at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitTransient(TransientCallSite transientCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitIEnumerable(IEnumerableCallSite enumerableCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at Microsoft.AspNetCore.Builder.MvcApplicationBuilderExtensions.UseMvc(IApplicationBuilder app, Action1 configureRoutes)