diff --git a/src/Direction.cs b/src/Direction.cs
index f479744..6039bd5 100644
--- a/src/Direction.cs
+++ b/src/Direction.cs
@@ -6,10 +6,6 @@ using Vector3Float = UnityEngine.Vector3;
 namespace LinearAlgebra
 {
 
-    public class Direction
-    {
-namespace LinearAlgebra {
-
     /// <summary>
     /// A direction in 3D space
     /// </summary>
diff --git a/src/Matrix.cs b/src/Matrix.cs
index b50eb16..5196d48 100644
--- a/src/Matrix.cs
+++ b/src/Matrix.cs
@@ -84,8 +84,6 @@ namespace LinearAlgebra {
             for (int ix = 0; ix < n; ix++)
                 this.data[ix, ix] = v.data[ix];
         }
-        public void FillDiagonal(float f) {
-            uint n = Math.Min(this.nRows, this.nCols);
         public void FillDiagonal(float f)
         {
             int n = Math.Min(this.nRows, this.nCols);
diff --git a/src/Quaternion.cs b/src/Quaternion.cs
index cd7e9f4..52dd26b 100644
--- a/src/Quaternion.cs
+++ b/src/Quaternion.cs
@@ -18,12 +18,11 @@ namespace LinearAlgebra {
             this.w = w;
         }
 
+#if UNITY_5_3_OR_NEWER
         public static Quaternion Reflect(Quaternion q) {
             return new(-q.x, -q.y, -q.z, q.w);
         }
 
-
-#if UNITY_5_3_OR_NEWER
         public static Matrix2 ToRotationMatrix(Quaternion q) {
             float w = q.x, x = q.y, y = q.z, z = q.w;
 
diff --git a/src/SwingTwist.cs b/src/SwingTwist.cs
index fe9a1b6..22eb0bb 100644
--- a/src/SwingTwist.cs
+++ b/src/SwingTwist.cs
@@ -3,8 +3,6 @@ using System.Numerics;
 using Quaternion = UnityEngine.Quaternion;
 #endif
 
-namespace LinearAlgebra
-{
 namespace LinearAlgebra {
 
     public class SwingTwist {