public static class IOExtensions {

    public static void CopyTo(this DirectoryInfo source, DirectoryInfo destination, bool recursive = false, Regex? pattern = null, bool negatePattern = false) {

        if (destination.FullName.StartsWith(source.FullName))
            throw new InvalidOperationException("The target directory must not be inside the source directory");

        if (!source.Exists)
            throw new DirectoryNotFoundException($"Source directory not found: '{source.FullName}'");

        if (!destination.Exists) {
            destination.Create();
        } else if (destination.EnumerateFiles("*", SearchOption.AllDirectories).Any()){
            throw new IOException("Target directory not empty");
        }

        List<Exception> exceptions = new List<Exception>();

        foreach(var subInfo in source.EnumerateFileSystemInfos().Where(i => pattern != null ? (negatePattern ? !pattern.IsMatch(i.Name) : pattern.IsMatch(i.Name)) : true)){
            try {
                var destinationPath = Path.Combine(destination.FullName, subInfo.Name);
                if (subInfo is DirectoryInfo) {
                    if (recursive) {
                        ((DirectoryInfo)subInfo).CopyTo(new DirectoryInfo(destinationPath), recursive);
                    } else {
                        new DirectoryInfo(destinationPath).Create();
                    }
                } else if (subInfo is FileInfo) {
                    ((FileInfo)subInfo).CopyTo(destinationPath, false);
                }
            } catch (Exception ex) {
                exceptions.Add(ex);
            }
        }

        if (exceptions.Any()) {
            throw new AggregateException("Copying files completed with errors", exceptions);
        }

    }

}