diff --git a/csharp.xUnit/GildedRose/ConjuredItemUpdater.cs b/csharp.xUnit/GildedRose/ConjuredItemUpdater.cs
new file mode 100644
index 00000000..8d6499ef
--- /dev/null
+++ b/csharp.xUnit/GildedRose/ConjuredItemUpdater.cs
@@ -0,0 +1,17 @@
+namespace GildedRoseKata;
+
+public class ConjuredItemUpdater : ItemUpdaterBase
+{
+    // Matched by prefix in ItemUpdaterFactory: handles every "Conjured..." item.
+    public override string Name => ItemUpdaterFactory.ConjuredPrefix;
+
+    public override void Update(Item item)
+    {
+        item.Quality = ClampQuality(item.Quality - 2);
+        item.SellIn -= 1;
+        if (item.SellIn < 0)
+        {
+            item.Quality = ClampQuality(item.Quality - 2);
+        }
+    }
+}
diff --git a/csharp.xUnit/GildedRose/ItemUpdaterFactory.cs b/csharp.xUnit/GildedRose/ItemUpdaterFactory.cs
index a6bc365d..02968064 100644
--- a/csharp.xUnit/GildedRose/ItemUpdaterFactory.cs
+++ b/csharp.xUnit/GildedRose/ItemUpdaterFactory.cs
@@ -31,6 +31,7 @@ public class ItemUpdaterFactory : IItemUpdaterFactory
         new AgedBrieUpdater(),
         new SulfurasUpdater(),
         new BackstagePassUpdater(),
+        new ConjuredItemUpdater(),
     });
 
     public IItemUpdater Get(Item item)