diff --git a/Behaviors/Radar.cs b/Behaviors/Radar.cs
index 185b127..786ef0e 100644
--- a/Behaviors/Radar.cs
+++ b/Behaviors/Radar.cs
@@ -1,5 +1,5 @@
 using System.Linq;
-using System.Collections.Generic;
+using C5;
 using UnityEngine;
 using UnitySteer;
 using UnitySteer.Helpers;
@@ -24,9 +24,10 @@ public class Radar: MonoBehaviour, ITick {
 	[SerializeField]
 	LayerMask _layersChecked;
 		
+	
 	IList<Collider> _detected;
-	List<Vehicle> _vehicles = new List<Vehicle>();
-	List<Obstacle> _obstacles = new List<Obstacle>();
+	IList<Vehicle> _vehicles = new ArrayList<Vehicle>();
+	IList<Obstacle> _obstacles = new ArrayList<Obstacle>();
 	
 	ObstacleFactory _obstacleFactory = null;
 	
@@ -51,7 +52,7 @@ public class Radar: MonoBehaviour, ITick {
 	public IList<Obstacle> Obstacles {
 		get {
 			ExecuteRadar();
-			return _obstacles.AsReadOnly();
+			return new GuardedList<Obstacle>(_obstacles);
 		}
 
 	}
@@ -80,7 +81,7 @@ public class Radar: MonoBehaviour, ITick {
 	public IList<Vehicle> Vehicles {
 		get {
 			ExecuteRadar();
-			return _vehicles.AsReadOnly();
+			return new GuardedList<Vehicle>(_vehicles);
 		}
 	}
 
@@ -154,7 +155,7 @@ void ExecuteRadar()
 	
 	protected virtual IList<Collider> Detect()
 	{
-		return new List<Collider>();
+		return new ArrayList<Collider>();
 	}
 	
 	protected virtual void FilterDetected()
diff --git a/Behaviors/RadarPing.cs b/Behaviors/RadarPing.cs
index e7e7f33..01d0cd8 100644
--- a/Behaviors/RadarPing.cs
+++ b/Behaviors/RadarPing.cs
@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using C5;
 using UnityEngine;
 using UnitySteer.Helpers;
 
@@ -47,7 +47,8 @@ void OnDrawGizmos()
 	protected override IList<Collider> Detect()
 	{
 		var detected = Physics.OverlapSphere(Vehicle.Position, _detectionRadius, LayersChecked);
-		var list = new List<Collider>(detected);
+		var list = new ArrayList<Collider>();
+		list.AddAll<Collider>(detected);
 		return list;
 	}
 	#endregion
diff --git a/C5.meta b/C5.meta
new file mode 100644
index 0000000..5c053f5
--- /dev/null
+++ b/C5.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 1
+guid: a6f9e8bcc9e094c1d890bebb499ef21b
diff --git a/C5/C5.dll b/C5/C5.dll
new file mode 100644
index 0000000..2130d1f
Binary files /dev/null and b/C5/C5.dll differ
diff --git a/C5/C5.dll.meta b/C5/C5.dll.meta
new file mode 100644
index 0000000..d93a77c
--- /dev/null
+++ b/C5/C5.dll.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 1
+guid: d63b4951b19c042b69d25334d31c5c2d
diff --git a/C5/LICENSE.txt b/C5/LICENSE.txt
new file mode 100644
index 0000000..90e8165
--- /dev/null
+++ b/C5/LICENSE.txt
@@ -0,0 +1,32 @@
+THE C5 GENERIC COLLECTION LIBRARY FOR C#/CLI
+
+Niels Kokholm and Peter Sestoft
+IT University of Copenhagen, Denmark
+
+See http://www.itu.dk/research/c5/
+and http://www.itu.dk/research/c5/Release1.0/ITU-TR-2006-76.pdf
+
+--------------------------------------------
+
+LICENSE
+
+Copyright (c) 2003-2007 Niels Kokholm and Peter Sestoft
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+--------------------------------------------
diff --git a/C5/LICENSE.txt.meta b/C5/LICENSE.txt.meta
new file mode 100644
index 0000000..32cf726
--- /dev/null
+++ b/C5/LICENSE.txt.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 1
+guid: cead7757b6cb148d383c3c190a0674c6