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 exceptions = new List();

    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);
    }

}

}