convert to c#

ModpackUpdater.Manager/Extensions.cs

@@ -0,0 +1,40 @@
+namespace ModpackUpdater.Manager;
+
+
+public static class Extensions
+{
+
+    public 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);
+        }
+
+        // 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);
+            }
+        }
+    }
+
+}