C:\Users\dejhbk0l\Desktop\myTutorial>dotnet --list-sdks
2.1.700 [C:\Program Files\dotnet\sdk]
2.2.300 [C:\Program Files\dotnet\sdk]
3.0.100-preview6-012264 [C:\Program Files\dotnet\sdk]

C:\Users\dejhbk0l\Desktop\myTutorial>dotnet tool list --global
Package Id      Version          Commands
-------------------------------------------
dotnet-try      1.0.19317.5      dotnet-try

C:\Users\dejhbk0l\Desktop\myTutorial>dotnet try demo
Hosting environment: Production
Content root path: C:\Users\dejhbk0l\Desktop\myTutorial
Now listening on: https://localhost:55183
Application started. Press Ctrl+C to shut down.
Application is shutting down...

C:\Users\dejhbk0l\Desktop\myTutorial>dotnet try verify
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 WorkspaceServer.PackageRegistry.CreateForTryMode(DirectoryInfo project, PackageSource addSource) in F:\workspace.1\_work\1\s\WorkspaceServer\PackageRegistry.cs:line 169
   at MLS.Agent.CommandLine.CommandLineParser.<>c.<Create>b__7_2(VerifyOptions verifyOptions, IConsole console, StartupOptions startupOptions) in F:\workspace.1\_work\1\s\MLS.Agent\CommandLine\CommandLineParser.cs:line 91
   --- 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.CommandLine.Invocation.ModelBindingCommandHandler.InvokeAsync(InvocationContext context)
   at System.CommandLine.Invocation.InvocationPipeline.<>c__DisplayClass2_0.<<InvokeAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at MLS.Agent.CommandLine.CommandLineParser.<>c.<<Create>b__7_3>d.MoveNext() in F:\workspace.1\_work\1\s\MLS.Agent\CommandLine\CommandLineParser.cs:line 131
--- End of stack trace from previous location where exception was thrown ---
   at System.CommandLine.Invocation.InvocationExtensions.<>c.<<UseParseErrorReporting>b__16_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__14_0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass3_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__17_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()

C:\Users\dejhbk0l\Desktop\myTutorial>