diff --git a/src/DotRecast.Detour.Extras/Vector3f.cs b/src/DotRecast.Core/Vector3f.cs
similarity index 91%
rename from src/DotRecast.Detour.Extras/Vector3f.cs
rename to src/DotRecast.Core/Vector3f.cs
index 1f65d8e..fb1eab5 100644
--- a/src/DotRecast.Detour.Extras/Vector3f.cs
+++ b/src/DotRecast.Core/Vector3f.cs
@@ -16,18 +16,14 @@ freely, subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
-namespace DotRecast.Detour.Extras
+namespace DotRecast.Core
 {
-    public class Vector3f
+    public struct Vector3f
     {
         public float x { get; set; }
         public float y { get; set; }
         public float z { get; set; }
 
-        public Vector3f()
-        {
-        }
-
         public Vector3f(float x, float y, float z)
         {
             this.x = x;
diff --git a/src/DotRecast.Detour.Extras/DotRecast.Detour.Extras.csproj b/src/DotRecast.Detour.Extras/DotRecast.Detour.Extras.csproj
index b0da5a1..2a71f47 100644
--- a/src/DotRecast.Detour.Extras/DotRecast.Detour.Extras.csproj
+++ b/src/DotRecast.Detour.Extras/DotRecast.Detour.Extras.csproj
@@ -5,8 +5,8 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <ProjectReference Include="..\DotRecast.Recast\DotRecast.Recast.csproj"/>
-        <ProjectReference Include="..\DotRecast.Detour\DotRecast.Detour.csproj"/>
+        <ProjectReference Include="..\DotRecast.Recast\DotRecast.Recast.csproj" />
+        <ProjectReference Include="..\DotRecast.Detour\DotRecast.Detour.csproj" />
     </ItemGroup>
 
 </Project>
diff --git a/src/DotRecast.Detour.Extras/Unity/Astar/GraphMeta.cs b/src/DotRecast.Detour.Extras/Unity/Astar/GraphMeta.cs
index f6c62c9..8fbdd19 100644
--- a/src/DotRecast.Detour.Extras/Unity/Astar/GraphMeta.cs
+++ b/src/DotRecast.Detour.Extras/Unity/Astar/GraphMeta.cs
@@ -16,6 +16,8 @@ freely, subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
+using DotRecast.Core;
+
 namespace DotRecast.Detour.Extras.Unity.Astar
 {
     public class GraphMeta
diff --git a/src/DotRecast.Detour.Extras/Unity/Astar/NodeLink2.cs b/src/DotRecast.Detour.Extras/Unity/Astar/NodeLink2.cs
index 45c06a1..479dd24 100644
--- a/src/DotRecast.Detour.Extras/Unity/Astar/NodeLink2.cs
+++ b/src/DotRecast.Detour.Extras/Unity/Astar/NodeLink2.cs
@@ -16,6 +16,8 @@ freely, subject to the following restrictions:
 3. This notice may not be removed or altered from any source distribution.
 */
 
+using DotRecast.Core;
+
 namespace DotRecast.Detour.Extras.Unity.Astar
 {
     public class NodeLink2