Fixed warnings

RGB.NET.Brushes/Brushes/ConicalGradientBrush.cs

@@ -29,7 +29,7 @@ namespace RGB.NET.Brushes
             set => SetProperty(ref _origin, value);
         }
 
-        private Point _center = new Point(0.5, 0.5);
+        private Point _center = new(0.5, 0.5);
         /// <summary>
         /// Gets or sets the center <see cref="Point"/> (as percentage in the range [0..1]) of the <see cref="IGradient"/> drawn by this <see cref="ConicalGradientBrush"/>. (default: 0.5, 0.5)
         /// </summary>
@@ -39,12 +39,12 @@ namespace RGB.NET.Brushes
             set => SetProperty(ref _center, value);
         }
 
-        private IGradient _gradient;
+        private IGradient? _gradient;
         /// <inheritdoc />
         /// <summary>
         /// Gets or sets the gradient drawn by the brush. If null it will default to full transparent.
         /// </summary>
-        public IGradient Gradient
+        public IGradient? Gradient
         {
             get => _gradient;
             set => SetProperty(ref _gradient, value);
@@ -104,6 +104,8 @@ namespace RGB.NET.Brushes
         /// <inheritdoc />
         protected override Color GetColorAtPoint(Rectangle rectangle, BrushRenderTarget renderTarget)
         {
+            if (Gradient == null) return Color.Transparent;
+
             double centerX = rectangle.Size.Width * Center.X;
             double centerY = rectangle.Size.Height * Center.Y;
 

RGB.NET.Brushes/Brushes/IGradientBrush.cs

@@ -12,6 +12,6 @@ namespace RGB.NET.Brushes
         /// <summary>
         /// Gets the <see cref="IGradient"/> used by this <see cref="IGradientBrush"/>.
         /// </summary>
-        IGradient Gradient { get; }
+        IGradient? Gradient { get; }
     }
 }

RGB.NET.Brushes/Brushes/LinearGradientBrush.cs

@@ -20,7 +20,7 @@ namespace RGB.NET.Brushes
     {
         #region Properties & Fields
 
-        private Point _startPoint = new Point(0, 0.5);
+        private Point _startPoint = new(0, 0.5);
         /// <summary>
         /// Gets or sets the start <see cref="Point"/> (as percentage in the range [0..1]) of the <see cref="IGradient"/> drawn by this <see cref="LinearGradientBrush"/>. (default: 0.0, 0.5)
         /// </summary>
@@ -30,7 +30,7 @@ namespace RGB.NET.Brushes
             set => SetProperty(ref _startPoint, value);
         }
 
-        private Point _endPoint = new Point(1, 0.5);
+        private Point _endPoint = new(1, 0.5);
         /// <summary>
         /// Gets or sets the end <see cref="Point"/>  (as percentage in the range [0..1]) of the <see cref="IGradient"/> drawn by this <see cref="LinearGradientBrush"/>. (default: 1.0, 0.5)
         /// </summary>
@@ -40,9 +40,9 @@ namespace RGB.NET.Brushes
             set => SetProperty(ref _endPoint, value);
         }
 
-        private IGradient _gradient;
+        private IGradient? _gradient;
         /// <inheritdoc />
-        public IGradient Gradient
+        public IGradient? Gradient
         {
             get => _gradient;
             set => SetProperty(ref _gradient, value);
@@ -97,8 +97,8 @@ namespace RGB.NET.Brushes
         {
             if (Gradient == null) return Color.Transparent;
 
-            Point startPoint = new Point(StartPoint.X * rectangle.Size.Width, StartPoint.Y * rectangle.Size.Height);
-            Point endPoint = new Point(EndPoint.X * rectangle.Size.Width, EndPoint.Y * rectangle.Size.Height);
+            Point startPoint = new(StartPoint.X * rectangle.Size.Width, StartPoint.Y * rectangle.Size.Height);
+            Point endPoint = new(EndPoint.X * rectangle.Size.Width, EndPoint.Y * rectangle.Size.Height);
 
             double offset = GradientHelper.CalculateLinearGradientOffset(startPoint, endPoint, renderTarget.Point);
             return Gradient.GetColor(offset);

RGB.NET.Brushes/Brushes/RadialGradientBrush.cs

@@ -18,7 +18,7 @@ namespace RGB.NET.Brushes
     {
         #region Properties & Fields
 
-        private Point _center = new Point(0.5, 0.5);
+        private Point _center = new(0.5, 0.5);
         /// <summary>
         /// Gets or sets the center <see cref="Point"/> (as percentage in the range [0..1]) around which the <see cref="RadialGradientBrush"/> should be drawn. (default: 0.5, 0.5)
         /// </summary>
@@ -28,9 +28,9 @@ namespace RGB.NET.Brushes
             set => SetProperty(ref _center, value);
         }
 
-        private IGradient _gradient;
+        private IGradient? _gradient;
         /// <inheritdoc />
-        public IGradient Gradient
+        public IGradient? Gradient
         {
             get => _gradient;
             set => SetProperty(ref _gradient, value);
@@ -78,7 +78,7 @@ namespace RGB.NET.Brushes
         {
             if (Gradient == null) return Color.Transparent;
 
-            Point centerPoint = new Point(rectangle.Location.X + (rectangle.Size.Width * Center.X), rectangle.Location.Y + (rectangle.Size.Height * Center.Y));
+            Point centerPoint = new(rectangle.Location.X + (rectangle.Size.Width * Center.X), rectangle.Location.Y + (rectangle.Size.Height * Center.Y));
 
             // Calculate the distance to the farthest point from the center as reference (this has to be a corner)
             // ReSharper disable once RedundantCast - never trust this ...

RGB.NET.Brushes/Brushes/SolidColorBrush.cs

@@ -52,7 +52,7 @@ namespace RGB.NET.Brushes
         /// Converts a <see cref="Color" /> to a <see cref="SolidColorBrush" />.
         /// </summary>
         /// <param name="color">The <see cref="Color"/> to convert.</param>
-        public static explicit operator SolidColorBrush(Color color) => new SolidColorBrush(color);
+        public static explicit operator SolidColorBrush(Color color) => new(color);
 
         /// <summary>
         /// Converts a <see cref="SolidColorBrush" /> to a <see cref="Color" />.