Copy all files in directory in C#

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void Copy(string sourceDir, string targetDir)
{
    Directory.CreateDirectory(targetDir);

    foreach(var file in Directory.GetFiles(sourceDir))
        File.Copy(file, Path.Combine(targetDir, Path.GetFileName(file)));

    foreach(var directory in Directory.GetDirectories(sourceDir))
        Copy(directory, Path.Combine(targetDir, Path.GetFileName(directory)));
}

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