dotnet serve -d dist\demo1 not working in .NET 6

Describe the bug

The -d command option usage is not what I expected.

To Reproduce Steps to reproduce the behavior:

1. Using this version (run dotnet serve --version): 1.8.34+6a96cbef9da7bfc86f6424f2ee499819cc617f7a

2. Run these arguments ‘…’

   This command is not working.

   dotnet serve -d dist\demo1
   

   This is okay.

   dotnet serve --directory dist\demo1
   

   This is okay too.

   dotnet serve -d=dist\demo1
   

3. See error

Expected behavior

This command should working.

```sh
dotnet serve -d dist\demo1
```

Screenshots If applicable, add screenshots to help explain your problem.

Specify --help for a list of available options and commands.
Unexpected error: McMaster.Extensions.CommandLineUtils.UnrecognizedCommandParsingException: Unrecognized command or argument 'dist\demo1'
   at McMaster.Extensions.CommandLineUtils.CommandLineProcessor.ProcessUnexpectedArg(String argTypeName, String argValue)
   at McMaster.Extensions.CommandLineUtils.CommandLineProcessor.ProcessCommandOrParameter(CommandOrParameterArgument arg)
   at McMaster.Extensions.CommandLineUtils.CommandLineProcessor.ProcessNext()
   at McMaster.Extensions.CommandLineUtils.CommandLineProcessor.Process()
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Parse(String[] args)
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.ExecuteAsync(String[] args, CancellationToken cancellationToken)
   at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
   at McMaster.DotNet.Serve.Program.Run(String[] args) in D:\a\dotnet-serve\dotnet-serve\src\dotnet-serve\Program.cs:line 46

Additional context Add any other context about the problem here.

[natemcmaster]

@doggy8088 I’ll need your help to make some noise to get the attention of the devs at Microsoft. This looks like a regression in .NET itself. I used to be one so know how many pings and issues they receive from github.

In the meantime, try to workaround this by calling dotnet-serve instead of dotnet serve.

[natemcmaster]

https://github.com/dotnet/sdk/issues/16120