diff --git a/Source/OpenTK/Graphics/GL/GLHelper.cs b/Source/OpenTK/Graphics/GL/GLHelper.cs
index c744c5d2..48dce12f 100644
--- a/Source/OpenTK/Graphics/GL/GLHelper.cs
+++ b/Source/OpenTK/Graphics/GL/GLHelper.cs
@@ -641,7 +641,7 @@ namespace OpenTK.Graphics
 
         #endregion
 
-        #region overloads using OpenTK.Math classes
+        #region --- Overloads for OpenTK.Math ---
 
         public static void Normal3(Vector3 normal)
         {
@@ -794,27 +794,27 @@ namespace OpenTK.Graphics
             }
         }
 
-        #endregion
-        
-        #region public static void GetProgramInfoLog(Int32 program, out string info)
-        
-        public static void GetProgramInfoLog(Int32 program, out string info)
-        {
-            unsafe
-            {
-                int length;
-                GL.GetProgram(program, ProgramParameter.InfoLogLength, out length);
-                if (length == 0)
-                {
-                    info = "";
-                    return;
-                }
-                StringBuilder sb = new StringBuilder(length);
-                Delegates.glGetProgramInfoLog((UInt32)program, sb.Capacity, &length, sb);
-                info = sb.ToString();
-            }
-        }
-        
+        #endregion
+        
+        #region public static void GetProgramInfoLog(Int32 program, out string info)
+        
+        public static void GetProgramInfoLog(Int32 program, out string info)
+        {
+            unsafe
+            {
+                int length;
+                GL.GetProgram(program, ProgramParameter.InfoLogLength, out length);
+                if (length == 0)
+                {
+                    info = "";
+                    return;
+                }
+                StringBuilder sb = new StringBuilder(length);
+                Delegates.glGetProgramInfoLog((UInt32)program, sb.Capacity, &length, sb);
+                info = sb.ToString();
+            }
+        }
+        
         #endregion
 
         #region public static void PointParameter(PointSpriteCoordOriginParameter param)
@@ -831,60 +831,98 @@ namespace OpenTK.Graphics
             GL.PointParameter(PointParameterName.PointSpriteCoordOrigin, (int)param);
         }
 
-        #endregion
-        
-        #region public static void VertexAttrib2(Int32 index, ref Vector2 v)
-        
-        public static void VertexAttrib2(Int32 index, ref Vector2 v)
-        {
-            GL.VertexAttrib2(index, v.X, v.Y);
-        }
-        
-        #endregion
-        
-        #region public static void VertexAttrib3(Int32 index, ref Vector3 v)
-
-        public static void VertexAttrib3(Int32 index, ref Vector3 v)
-        {
-            GL.VertexAttrib3(index, v.X, v.Y, v.Z);
-        }
-        
-        #endregion
-        
-        #region public static void VertexAttrib4(Int32 index, ref Vector4 v)
-
-        public static void VertexAttrib4(Int32 index, ref Vector4 v)
-        {
-            GL.VertexAttrib4(index, v.X, v.Y, v.Z, v.W);
-        }
-        
-        #endregion
-
-        #region public static void MultiTexCoord2(TextureUnit target, ref Vector2 v)        
-        
-        public static void MultiTexCoord2(TextureUnit target, ref Vector2 v)
-        {
-            GL.MultiTexCoord2(target, v.X, v.Y);
-        }
-        
-        #endregion
-                
-        #region public static void MultiTexCoord3(TextureUnit target, ref Vector3 v)
-
-        public static void MultiTexCoord3(TextureUnit target, ref Vector3 v)
-        {
-            GL.MultiTexCoord3(target, v.X, v.Y, v.Z);
-        }
-        
-        #endregion
-
-        #region public static void MultiTexCoord4(TextureUnit target, ref Vector4 v)
-        
-        public static void MultiTexCoord4(TextureUnit target, ref Vector4 v)
-        {
-            GL.MultiTexCoord4(target, v.X, v.Y, v.Z, v.W);
-        }
-        
+        #endregion
+        
+        #region public static void VertexAttrib2(Int32 index, ref Vector2 v)
+        
+        public static void VertexAttrib2(Int32 index, ref Vector2 v)
+        {
+            GL.VertexAttrib2(index, v.X, v.Y);
+        }
+        
+        #endregion
+        
+        #region public static void VertexAttrib3(Int32 index, ref Vector3 v)
+
+        public static void VertexAttrib3(Int32 index, ref Vector3 v)
+        {
+            GL.VertexAttrib3(index, v.X, v.Y, v.Z);
+        }
+        
+        #endregion
+        
+        #region public static void VertexAttrib4(Int32 index, ref Vector4 v)
+
+        public static void VertexAttrib4(Int32 index, ref Vector4 v)
+        {
+            GL.VertexAttrib4(index, v.X, v.Y, v.Z, v.W);
+        }
+        
+        #endregion
+
+        #region public static void MultiTexCoord2(TextureUnit target, ref Vector2 v)        
+        
+        public static void MultiTexCoord2(TextureUnit target, ref Vector2 v)
+        {
+            GL.MultiTexCoord2(target, v.X, v.Y);
+        }
+        
+        #endregion
+                
+        #region public static void MultiTexCoord3(TextureUnit target, ref Vector3 v)
+
+        public static void MultiTexCoord3(TextureUnit target, ref Vector3 v)
+        {
+            GL.MultiTexCoord3(target, v.X, v.Y, v.Z);
+        }
+        
+        #endregion
+
+        #region public static void MultiTexCoord4(TextureUnit target, ref Vector4 v)
+        
+        public static void MultiTexCoord4(TextureUnit target, ref Vector4 v)
+        {
+            GL.MultiTexCoord4(target, v.X, v.Y, v.Z, v.W);
+        }
+        
+        #endregion
+
+        #region public static void Rect(System.Drawing.RectangleF rect)
+
+        public static void Rect(System.Drawing.RectangleF rect)
+        {
+            GL.Rect(rect.Left, rect.Top, rect.Right, rect.Bottom);
+        }
+
+        #endregion
+
+        #region public static void Rect(ref System.Drawing.RectangleF rect)
+
+        [CLSCompliant(false)]
+        public static void Rect(ref System.Drawing.RectangleF rect)
+        {
+            GL.Rect(rect.Left, rect.Top, rect.Right, rect.Bottom);
+        }
+
+        #endregion
+
+        #region public static void Rect(System.Drawing.Rectangle rect)
+
+        public static void Rect(System.Drawing.Rectangle rect)
+        {
+            GL.Rect(rect.Left, rect.Top, rect.Right, rect.Bottom);
+        }
+
+        #endregion
+
+        #region public static void Rect(ref System.Drawing.Rectangle rect)
+
+        [CLSCompliant(false)]
+        public static void Rect(ref System.Drawing.Rectangle rect)
+        {
+            GL.Rect(rect.Left, rect.Top, rect.Right, rect.Bottom);
+        }
+
         #endregion
 
         #endregion