fix code styling issues

src/ImageSharp.Drawing/Processing/Drawing/Brushes/LinearGradientBrush.cs

@@ -19,33 +19,6 @@ namespace SixLabors.ImageSharp.Processing.Drawing.Brushes
     public class LinearGradientBrush<TPixel> : IBrush<TPixel>
         where TPixel : struct, IPixel<TPixel>
     {
-        /// <summary>
-        /// A struct that defines a single color stop.
-        /// </summary>
-        public struct ColorStop
-        {
-            /// <summary>
-            /// Create a new ColorStop
-            /// </summary>
-            /// <param name="ratio">Where should it be? 0 is at the start, 1 at the end of the <see cref="LinearGradientBrush{TPixel}"/>.</param>
-            /// <param name="color">What color should be used at that point?</param>
-            public ColorStop(float ratio, TPixel color)
-            {
-                this.Ratio = ratio;
-                this.Color = color;
-            }
-            
-            /// <summary>
-            /// The point along the defined <see cref="LinearGradientBrush{TPixel}" /> gradient axis.
-            /// </summary>
-            public float Ratio { get; }
-
-            /// <summary>
-            /// The color to be used.
-            /// </summary>
-            public TPixel Color { get; }
-        }
-        
         private readonly Point p1;
 
         private readonly Point p2;
@@ -73,6 +46,33 @@ namespace SixLabors.ImageSharp.Processing.Drawing.Brushes
         public BrushApplicator<TPixel> CreateApplicator(ImageFrame<TPixel> source, RectangleF region, GraphicsOptions options)
             => new LinearGradientBrushApplicator(source, this.p1, this.p2, this.colorStops, region, options);
 
+        /// <summary>
+        /// A struct that defines a single color stop.
+        /// </summary>
+        public struct ColorStop
+        {
+            /// <summary>
+            /// Initializes a new instance of the <see cref="ColorStop" /> struct.
+            /// </summary>
+            /// <param name="ratio">Where should it be? 0 is at the start, 1 at the end of the <see cref="LinearGradientBrush{TPixel}"/>.</param>
+            /// <param name="color">What color should be used at that point?</param>
+            public ColorStop(float ratio, TPixel color)
+            {
+                this.Ratio = ratio;
+                this.Color = color;
+            }
+
+            /// <summary>
+            /// Gets the point along the defined <see cref="LinearGradientBrush{TPixel}" /> gradient axis.
+            /// </summary>
+            public float Ratio { get; }
+
+            /// <summary>
+            /// Gets the color to be used.
+            /// </summary>
+            public TPixel Color { get; }
+        }
+
         /// <summary>
         /// The linear gradient brush applicator.
         /// </summary>

tests/ImageSharp.Tests/Drawing/FillLinearGradientBrushTests.cs

@@ -39,5 +39,48 @@ namespace SixLabors.ImageSharp.Tests.Drawing
                 }
             }
         }
+        
+        [Fact]
+        public void HorizontalLinearGradientBrushReturnsUnicolorColumns()
+        {
+            int width = 500;
+            int height = 500;
+            int lastColumnIndex = width - 1;
+            int lastRowIndex = height - 1;
+            
+            
+            string path = TestEnvironment.CreateOutputDirectory("Fill", "LinearGradientBrush");
+            using (var image = new Image<Rgba32>(width, height))
+            {
+                LinearGradientBrush<Rgba32> unicolorLinearGradientBrush = 
+                    new LinearGradientBrush<Rgba32>(
+                        new SixLabors.Primitives.Point(0, 0),
+                        new SixLabors.Primitives.Point(500, 0),
+                        new LinearGradientBrush<Rgba32>.ColorStop(0, Rgba32.Red),
+                        new LinearGradientBrush<Rgba32>.ColorStop(1, Rgba32.Yellow));
+                
+                image.Mutate(x => x.Fill(unicolorLinearGradientBrush));
+                image.Save($"{path}/horizontalGradient.png");
+
+                using (PixelAccessor<Rgba32> sourcePixels = image.Lock())
+                {
+                    Rgba32 columnColor23 = sourcePixels[23, 0];
+                    Rgba32 columnColor42 = sourcePixels[42, 0];
+                    Rgba32 columnColor333 = sourcePixels[333, 0];
+                    
+                    for (int i = 0; i < height; i++)
+                    {
+                        // check first and last column, these are known:
+                        Assert.Equal(Rgba32.Red, sourcePixels[0, i]);
+                        Assert.Equal(Rgba32.Yellow, sourcePixels[lastColumnIndex, i]);
+                        
+                        // check the random colors:
+                        Assert.Equal(columnColor23, sourcePixels[23, i]);
+                        Assert.Equal(columnColor42, sourcePixels[42, i]);
+                        Assert.Equal(columnColor333, sourcePixels[333, i]);
+                    }
+                }
+            }
+        }
     }
-}
+}