winui3 command line arguments not working

I am working on a winui3 (packaged) project.

I am trying to pass arguments while starting a new process
But for some reason, either the process starting method or arguments reading method isn't working.

These are the multiple ways I already tried.

To start the process

Process.Start(Environment.ProcessPath, StartupMethod.UPLOAD);

or

ProcessStartInfo processStartInfo = new()
{
    FileName = Environment.ProcessPath,
    Arguments = StartupMethod.UPLOAD
};

Process.Start(processStartInfo);

To read the arguments

string[] arguments = args.Arguments.Split(" ", StringSplitOptions.RemoveEmptyEntries);

or

string[] arguments = Environment.GetCommandLineArgs();

But none of the combinations seems to be working.

Also, I tried to run the Environment.ProcessPath manually, but the .exe file isn't running for some reason.

To start the process

Process.Start(Environment.ProcessPath, "Arguments");

To read the arguments

string[] arguments = Environment.GetCommandLineArgs();

The Environment.GetCommandLineArgs() return filename at the first position, so might want to skip that

This works for me.

Start the process

Process P = new();
P.StartInfo.UseShellExecute = true;
P.StartInfo.Verb = "runas";
P.StartInfo.FileName = Environment.ProcessPath;
P.StartInfo.Arguments = "This is a Test"; 
P.Start();

Read the arguments in App.xaml.cs

protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
{
    m_window = new MainWindow();
    m_window.Activate();

    string[] arguments = Environment.GetCommandLineArgs();
    if (arguments.Length > 1)
    {
        //do something
    }
            
}