();
        if (Directory.Exists(plugins))
        {
            foreach (var plugin in Directory.GetDirectories(plugins))
            {
                foreach (var file in Directory.GetFiles(plugin, "*", SearchOption.AllDirectories))
                {
                    var relative = file.Substring(plugin.TrimEnd(Path.DirectorySeparatorChar).Length + 1);
                    // Plugin settings are owned by the plugin even when identical to host settings.
                    if (Path.GetFileName(file).StartsWith("appsettings", StringComparison.OrdinalIgnoreCase)
                        && string.Equals(Path.GetExtension(file), ".json", StringComparison.OrdinalIgnoreCase))
                        continue;
                    var shared = Path.GetFullPath(Path.Combine(host, relative));
                    // Only compare files below the host, outside its plugin subtree.
                    if (!shared.StartsWith(host.TrimEnd(Path.DirectorySeparatorChar) + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase)
                        || shared.StartsWith(plugins + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase)
                        || !File.Exists(shared) || new FileInfo(file).Length != new FileInfo(shared).Length)
                        continue;
                    using (var hash = SHA256.Create())
                    using (var source = File.OpenRead(file))
                    using (var target = File.OpenRead(shared))
                    {
                        if (Convert.ToBase64String(hash.ComputeHash(source)) == Convert.ToBase64String(hash.ComputeHash(target)))
                            duplicates.Add(new Microsoft.Build.Utilities.TaskItem(file));
                    }
                }
            }
        }
        Duplicates = duplicates.ToArray();
      ]]>