Xml comments.

Drawing/Brush.cs

@@ -5,26 +5,57 @@
 
 using Ecng.Common;
 
+/// <summary>
+/// Represents a base class for drawing brushes.
+/// </summary>
 public abstract class Brush
 {
+	/// <summary>
+	/// Initializes a new instance of the <see cref="Brush"/> class.
+	/// </summary>
 	protected Brush()
 	{
 	}
 }
 
+/// <summary>
+/// Represents a brush that paints a solid color.
+/// </summary>
+/// <param name="color">The solid color to use for painting.</param>
 public class SolidBrush(Color color) : Brush
 {
+	/// <summary>
+	/// Gets the solid <see cref="Color"/> used by the brush.
+	/// </summary>
 	public Color Color { get; } = color;
 }
 
+/// <summary>
+/// Represents a brush that paints a gradient between multiple colors.
+/// </summary>
+/// <param name="linearColors">An array of colors defining the gradient stops.</param>
+/// <param name="rectangle">The rectangle that defines the bounds of the gradient.</param>
 public class LinearGradientBrush(Color[] linearColors, Rectangle rectangle) : Brush
 {
+	/// <summary>
+	/// Initializes a new instance of the <see cref="LinearGradientBrush"/> class using two points and two colors.
+	/// </summary>
+	/// <param name="stop0">The first point of the gradient.</param>
+	/// <param name="stop1">The second point of the gradient.</param>
+	/// <param name="color0">The color at the first point.</param>
+	/// <param name="color1">The color at the second point.</param>
 	public LinearGradientBrush(Point stop0, Point stop1, Color color0, Color color1)
 		: this([color0, color1], new(stop0, new((stop1.X - stop0.X).Abs(), (stop1.Y - stop0.Y).Abs())))
 	{
 	}
 
+	/// <summary>
+	/// Gets the array of colors defining the gradient stops.
+	/// </summary>
 	public Color[] LinearColors { get; } = linearColors ?? throw new ArgumentNullException(nameof(linearColors));
 
+	/// <summary>
+	/// Gets the rectangle that defines the bounds of the gradient.
+	/// </summary>
 	public Rectangle Rectangle { get; } = rectangle;
 }

Drawing/DrawingExtensions.cs

@@ -6,11 +6,26 @@
 #endif
 using System.Drawing;
 
+/// <summary>
+/// Provides extension methods for converting between integer, HTML color string representations and <see cref="Color"/>.
+/// </summary>
 public static class DrawingExtensions
 {
+	/// <summary>
+	/// Creates a Color from the specified ARGB integer.
+	/// </summary>
+	/// <param name="argb">An integer representing the ARGB value.</param>
+	/// <returns>A <see cref="Color"/> corresponding to the ARGB value specified.</returns>
 	public static Color ToColor(this int argb)
 		=> Color.FromArgb(argb);
 
+	/// <summary>
+	/// Converts an HTML color representation to a <see cref="Color"/>.
+	/// </summary>
+	/// <param name="htmlColor">
+	/// A string representing the HTML color. Accepts formats such as "#RRGGBB", "#RGB" or the special case "LightGrey".
+	/// </param>
+	/// <returns>A <see cref="Color"/> corresponding to the HTML color provided.</returns>
 	public static Color ToColor(this string htmlColor)
 	{
 #if NETSTANDARD2_0
@@ -77,6 +92,11 @@ public static Color ToColor(this string htmlColor)
 #endif
 	}
 
+	/// <summary>
+	/// Converts a <see cref="Color"/> to its HTML representation.
+	/// </summary>
+	/// <param name="color">The <see cref="Color"/> to convert.</param>
+	/// <returns>A string representing the HTML color value. Returns an empty string if the color is empty.</returns>
 	public static string ToHtml(this Color color)
 	{
 #if NETSTANDARD2_0