diff --git a/16_Bug/csharp/Game.cs b/16_Bug/csharp/Game.cs
index f1bc1291..c98c44f5 100644
--- a/16_Bug/csharp/Game.cs
+++ b/16_Bug/csharp/Game.cs
@@ -1,7 +1,9 @@
-using Bug.Resources;
+using BugGame.Resources;
 using Games.Common.IO;
 using Games.Common.Randomness;
 
+namespace BugGame;
+
 internal class Game
 {
     private readonly IReadWrite _io;
diff --git a/16_Bug/csharp/Parts/Body.cs b/16_Bug/csharp/Parts/Body.cs
new file mode 100644
index 00000000..61aad080
--- /dev/null
+++ b/16_Bug/csharp/Parts/Body.cs
@@ -0,0 +1,25 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class Body : ParentPart
+{
+    private readonly Neck _neck = new();
+    private readonly Tail _tail = new();
+    private readonly Legs _legs = new();
+
+    public Body()
+        : base(Message.BodyAdded, Message.BodyNotNeeded)
+    {
+    }
+
+    protected override bool TryAddCore(IPart part, out Message message)
+        => part switch
+        {
+            Neck => _neck.TryAdd(out message),
+            Head or Feeler => _neck.TryAdd(part, out message),
+            Tail => _tail.TryAdd(out message),
+            Leg => _legs.TryAddOne(out message),
+            _ => throw new NotSupportedException($"Can't add a {part.Name} to a {Name}.")
+        };
+}
diff --git a/16_Bug/csharp/Parts/Feeler.cs b/16_Bug/csharp/Parts/Feeler.cs
new file mode 100644
index 00000000..9508d541
--- /dev/null
+++ b/16_Bug/csharp/Parts/Feeler.cs
@@ -0,0 +1,6 @@
+namespace BugGame.Parts;
+
+internal class Feeler : IPart
+{
+    public string Name => nameof(Feeler);
+}
diff --git a/16_Bug/csharp/Parts/Feelers.cs b/16_Bug/csharp/Parts/Feelers.cs
new file mode 100644
index 00000000..fca80c33
--- /dev/null
+++ b/16_Bug/csharp/Parts/Feelers.cs
@@ -0,0 +1,11 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class Feelers : PartCollection
+{
+    public Feelers()
+        : base(6, Message.FeelerAdded, Message.FeelersFull)
+    {
+    }
+}
diff --git a/16_Bug/csharp/Parts/Head.cs b/16_Bug/csharp/Parts/Head.cs
new file mode 100644
index 00000000..2d5e705d
--- /dev/null
+++ b/16_Bug/csharp/Parts/Head.cs
@@ -0,0 +1,20 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class Head : ParentPart
+{
+    private Feelers _feelers = new();
+
+    public Head()
+        : base(Message.HeadAdded, Message.HeadNotNeeded)
+    {
+    }
+
+    protected override bool TryAddCore(IPart part, out Message message)
+        => part switch
+        {
+            Feeler => _feelers.TryAddOne(out message),
+            _ => throw new NotSupportedException($"Can't add a {part.Name} to a {Name}.")
+        };
+}
diff --git a/16_Bug/csharp/Parts/IPart.cs b/16_Bug/csharp/Parts/IPart.cs
new file mode 100644
index 00000000..e325a7c1
--- /dev/null
+++ b/16_Bug/csharp/Parts/IPart.cs
@@ -0,0 +1,6 @@
+namespace BugGame.Parts;
+
+internal interface IPart
+{
+    string Name { get; }
+}
diff --git a/16_Bug/csharp/Parts/Leg.cs b/16_Bug/csharp/Parts/Leg.cs
new file mode 100644
index 00000000..c2d4aaaf
--- /dev/null
+++ b/16_Bug/csharp/Parts/Leg.cs
@@ -0,0 +1,6 @@
+namespace BugGame.Parts;
+
+internal class Leg : IPart
+{
+    public string Name => nameof(Leg);
+}
diff --git a/16_Bug/csharp/Parts/Legs.cs b/16_Bug/csharp/Parts/Legs.cs
new file mode 100644
index 00000000..b108e2ea
--- /dev/null
+++ b/16_Bug/csharp/Parts/Legs.cs
@@ -0,0 +1,11 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class Legs : PartCollection
+{
+    public Legs()
+        : base(2, Message.LegAdded, Message.LegsFull)
+    {
+    }
+}
diff --git a/16_Bug/csharp/Parts/Neck.cs b/16_Bug/csharp/Parts/Neck.cs
new file mode 100644
index 00000000..035d0c18
--- /dev/null
+++ b/16_Bug/csharp/Parts/Neck.cs
@@ -0,0 +1,21 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class Neck : ParentPart
+{
+    private Head _head = new();
+
+    public Neck()
+        : base(Message.NeckAdded, Message.NeckNotNeeded)
+    {
+    }
+
+    protected override bool TryAddCore(IPart part, out Message message)
+        => part switch
+        {
+            Head => _head.TryAdd(out message),
+            Feeler => _head.TryAdd(part, out message),
+            _ => throw new NotSupportedException($"Can't add a {part.Name} to a {Name}.")
+        };
+}
diff --git a/16_Bug/csharp/Parts/ParentPart.cs b/16_Bug/csharp/Parts/ParentPart.cs
new file mode 100644
index 00000000..78a21d6e
--- /dev/null
+++ b/16_Bug/csharp/Parts/ParentPart.cs
@@ -0,0 +1,22 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal abstract class ParentPart : Part
+{
+    public ParentPart(Message addedMessage, Message duplicateMessage)
+        : base(addedMessage, duplicateMessage)
+    {
+    }
+
+    public bool TryAdd(IPart part, out Message message)
+        => IsPresent ? TryAddCore(part, out message) : ReportDoNotHave(out message);
+
+    protected abstract bool TryAddCore(IPart part, out Message message);
+
+    private bool ReportDoNotHave(out Message message)
+    {
+        message = Message.DoNotHaveA(this);
+        return false;
+    }
+}
diff --git a/16_Bug/csharp/Parts/Part.cs b/16_Bug/csharp/Parts/Part.cs
new file mode 100644
index 00000000..a1a5d64d
--- /dev/null
+++ b/16_Bug/csharp/Parts/Part.cs
@@ -0,0 +1,32 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class Part
+{
+    private readonly Message _addedMessage;
+    private readonly Message _duplicateMessage;
+
+    public Part(Message addedMessage, Message duplicateMessage)
+    {
+        _addedMessage = addedMessage;
+        _duplicateMessage = duplicateMessage;
+    }
+
+    protected bool IsPresent { get; private set; }
+
+    public string Name => GetType().Name;
+
+    public bool TryAdd(out Message message)
+    {
+        if (IsPresent)
+        {
+            message = _duplicateMessage;
+            return false;
+        }
+
+        message = _addedMessage;
+        IsPresent = true;
+        return true;
+    }
+}
diff --git a/16_Bug/csharp/Parts/PartCollection.cs b/16_Bug/csharp/Parts/PartCollection.cs
new file mode 100644
index 00000000..43a684b5
--- /dev/null
+++ b/16_Bug/csharp/Parts/PartCollection.cs
@@ -0,0 +1,31 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class PartCollection
+{
+    private readonly int _maxCount;
+    private readonly Message _addedMessage;
+    private readonly Message _fullMessage;
+    private int _count;
+
+    public PartCollection(int maxCount, Message addedMessage, Message fullMessage)
+    {
+        _maxCount = maxCount;
+        _addedMessage = addedMessage;
+        _fullMessage = fullMessage;
+    }
+
+    public bool TryAddOne(out Message message)
+    {
+        if (_count < _maxCount)
+        {
+            _count++;
+            message = _addedMessage.ForQuantity(_count);
+            return true;
+        }
+
+        message = _fullMessage;
+        return false;
+    }
+}
diff --git a/16_Bug/csharp/Parts/Tail.cs b/16_Bug/csharp/Parts/Tail.cs
new file mode 100644
index 00000000..ad610d81
--- /dev/null
+++ b/16_Bug/csharp/Parts/Tail.cs
@@ -0,0 +1,11 @@
+using BugGame.Resources;
+
+namespace BugGame.Parts;
+
+internal class Tail : Part
+{
+    public Tail()
+        : base(Message.TailAdded, Message.TailNotNeeded)
+    {
+    }
+}
\ No newline at end of file
diff --git a/16_Bug/csharp/Program.cs b/16_Bug/csharp/Program.cs
index bb3d85aa..883e62d1 100644
--- a/16_Bug/csharp/Program.cs
+++ b/16_Bug/csharp/Program.cs
@@ -1,3 +1,4 @@
+using BugGame;
 using Games.Common.IO;
 using Games.Common.Randomness;
 
diff --git a/16_Bug/csharp/Resources/Message.cs b/16_Bug/csharp/Resources/Message.cs
new file mode 100644
index 00000000..5cd9f998
--- /dev/null
+++ b/16_Bug/csharp/Resources/Message.cs
@@ -0,0 +1,42 @@
+namespace BugGame.Resources;
+
+internal class Message
+{
+    public static Message Rolled = new("rolled a {0}");
+
+    public static Message BodyAdded = new("now have a body.");
+    public static Message BodyNotNeeded = new("do not need a body.");
+
+    public static Message NeckAdded = new("now have a neck.");
+    public static Message NeckNotNeeded = new("do not need a neck.");
+
+    public static Message HeadAdded = new("needed a head.");
+    public static Message HeadNotNeeded = new("I do not need a head.", "You have a head.");
+
+    public static Message TailAdded = new("I now have a tail.", "I now give you a tail.");
+    public static Message TailNotNeeded = new("I do not need a tail.", "You already have a tail.");
+
+    public static Message FeelerAdded = new("I get a feeler.", "I now give you a feeler");
+    public static Message FeelersFull = new("I have 2 feelers already.", "You have two feelers already");
+
+    public static Message LegAdded = new("now have {0} legs");
+    public static Message LegsFull = new("I have 6 feet.", "You have 6 feet already");
+
+    private Message(string common)
+        : this("I " + common, "You" + common)
+    {
+    }
+
+    private Message(string i, string you)
+    {
+        I = i;
+        You = you;
+    }
+
+    public string I { get; }
+    public string You { get; }
+
+    public static Message DoNotHaveA(Part part) => new($"do no have a {part.Name}");
+
+    public Message ForQuantity(int quantity) => new(string.Format(I, quantity), string.Format(You, quantity));
+}
\ No newline at end of file
diff --git a/16_Bug/csharp/Resources/Resource.cs b/16_Bug/csharp/Resources/Resource.cs
index 51b7bf39..57f05438 100644
--- a/16_Bug/csharp/Resources/Resource.cs
+++ b/16_Bug/csharp/Resources/Resource.cs
@@ -1,7 +1,7 @@
 using System.Reflection;
 using System.Runtime.CompilerServices;
 
-namespace Bug.Resources;
+namespace BugGame.Resources;
 
 internal static class Resource
 {