public class Program : ConsoleProgram
{
    [Argument, ArgumentHelp("source file", "File to copy")]
    [ValidateFile(ShouldExist = true)]
    public string SourceFile { get; set; }
    
    [Argument(Optional = true)]
    [ArgumentHelp("destination dir", "Directory to copy the file")]
    [ValidateDirectory]
    public string DestinationDir { get; set; } = ".";
    
    [Flag("overwrite", "o")]
    [FlagHelp("Specify to allow overwriting the file if it already exists")]
    public bool OverwriteExistingFile { get; set; }
    
    [Flag("create-dir", "c")]
    [FlagHelp("Specify to create the destination directory if it does not exist")]
    public bool CreateDirIfMissing { get; set; }
    
    protected int HandleCommand()
    {
        Console.WriteLine($"You want to copy {SourceFile} to {DestinationDir}");
        Console.WriteLine($"Overwrite file if it exists: {OverwriteExistingFile}");
        Console.WriteLine($"Create destination directory if it does not exist: {CreateDirIfMissing}");
        return 0;
    }
    
    public static async Task<int> Main(string[] args)
    {
        var program = new Program();
        return await program.RunAsync(args);
    }
}