Zack.DotNetTrimmerLib/BackupHelper.cs

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namespace Zack.DotNetTrimmerLib
{
    public static class BackupHelper
    {
        public static string BackupProject(string startupFile)
        {
            string name = Path.GetFileNameWithoutExtension(startupFile);
            string srcDir = Path.GetDirectoryName(startupFile);
            string destDir = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Personal), name, "Backup");
            CopyDirectory(srcDir, destDir, true);
            return destDir;
        }

        static void CopyDirectory(string sourceDir, string destinationDir, bool recursive)
        {
            // Get information about the source directory
            var dir = new DirectoryInfo(sourceDir);

            // Check if the source directory exists
            if (!dir.Exists)
                throw new DirectoryNotFoundException($"Source directory not found: {dir.FullName}");

            // Cache directories before we start copying
            DirectoryInfo[] dirs = dir.GetDirectories();

            // Create the destination directory
            Directory.CreateDirectory(destinationDir);

            // Get the files in the source directory and copy to the destination directory
            foreach (FileInfo file in dir.GetFiles())
            {
                string targetFilePath = Path.Combine(destinationDir, file.Name);
                file.CopyTo(targetFilePath, true);
            }

            // If recursive and copying subdirectories, recursively call this method
            if (recursive)
            {
                foreach (DirectoryInfo subDir in dirs)
                {
                    string newDestinationDir = Path.Combine(destinationDir, subDir.Name);
                    CopyDirectory(subDir.FullName, newDestinationDir, true);
                }
            }
        }
    }
}