Corrected several incorrect uses of "it's"

examples/CSharp/OpenGL Tutorials/Tutorial 3.1 - Ambient Lighting/Program.cs

@@ -118,7 +118,7 @@ private static void OnLoad()
 
             VaoCube.VertexAttributePointer(0, 3, VertexAttribPointerType.Float, 3, 0);
 
-            //The lighting shader will give our main cube it's colour multiplied by the lights intensity
+            //The lighting shader will give our main cube its colour multiplied by the lights intensity
             LightingShader = new Shader(Gl, "shader.vert", "lighting.frag");
             //The Lamp shader uses a fragment shader that just colours it solid white so that we know it is the light source
             LampShader = new Shader(Gl, "shader.vert", "shader.frag");

examples/CSharp/OpenGL Tutorials/Tutorial 3.3 - Specular Lighting/Program.cs

@@ -120,7 +120,7 @@ private static void OnLoad()
             VaoCube.VertexAttributePointer(0, 3, VertexAttribPointerType.Float, 6, 0);
             VaoCube.VertexAttributePointer(1, 3, VertexAttribPointerType.Float, 6, 3);
 
-            //The lighting shader will give our main cube it's colour multiplied by the light's intensity
+            //The lighting shader will give our main cube its colour multiplied by the light's intensity
             LightingShader = new Shader(Gl, "shader.vert", "lighting.frag");
             //The Lamp shader uses a fragment shader that just colours it solid white so that we know it is the light source
             LampShader = new Shader(Gl, "shader.vert", "shader.frag");

examples/CSharp/OpenGL Tutorials/Tutorial 3.5 - Lighting Maps/Program.cs

@@ -129,7 +129,7 @@ private static void OnLoad()
             VaoCube.VertexAttributePointer(1, 3, VertexAttribPointerType.Float, 8, 3);
             VaoCube.VertexAttributePointer(2, 2, VertexAttribPointerType.Float, 8, 6);
 
-            //The lighting shader will give our main cube it's colour multiplied by the light's intensity
+            //The lighting shader will give our main cube its colour multiplied by the light's intensity
             LightingShader = new Shader(Gl, "shader.vert", "lighting.frag");
             //The Lamp shader uses a fragment shader that just colours it solid white so that we know it is the light source
             LampShader = new Shader(Gl, "shader.vert", "shader.frag");

src/Maths/Silk.NET.Maths/Box2D.cs

@@ -80,7 +80,7 @@ public Box2D(T minX, T minY, T maxX, T maxY)
 
         /// <summary>
         /// The size of this box.
-        /// When setting the box is scaled about it's center.
+        /// When setting the box is scaled about its center.
         /// </summary>
         [IgnoreDataMember]
         public Vector2D<T> Size => Max - Min;

src/Maths/Silk.NET.Maths/Box3D.cs

@@ -84,7 +84,7 @@ public Box3D(T minX, T minY, T minZ, T maxX, T maxY, T maxZ)
 
         /// <summary>
         /// The size of this box.
-        /// When setting the box is scaled about it's center.
+        /// When setting the box is scaled about its center.
         /// </summary>
         [IgnoreDataMember]
         public Vector3D<T> Size => Max - Min;

src/OpenAL/Extensions/Silk.NET.OpenAL.Extensions.Creative/Enums/EffectInteger.cs

@@ -115,7 +115,7 @@ public enum EffectInteger
         EaxReverbDecayHFLimit = 0x0017,
 
         /// <summary>
-        /// Used with the enum EfxEffectType as it's parameter.
+        /// Used with the enum EfxEffectType as its parameter.
         /// </summary>
         EffectType = 0x8001
     }