优化更新代码，添加界面功能并整合

WPFluent/Controls/IconElement/ImageIcon.cs

@@ -0,0 +1,53 @@
+
+
+
+// ReSharper disable once CheckNamespace
+namespace WPFluent.Controls;
+
+/// <summary>
+/// Represents an icon that uses an <see cref="System.Windows.Controls.Image"/> as its content.
+/// </summary>
+public class ImageIcon : IconElement
+{
+    /// <summary>
+    /// Identifies the <see cref="Source"/> dependency property.
+    /// </summary>
+    public static readonly DependencyProperty SourceProperty = DependencyProperty.Register(
+        nameof(Source),
+        typeof(ImageSource),
+        typeof(ImageIcon),
+        new FrameworkPropertyMetadata(
+            null,
+            FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender,
+            OnSourceChanged));
+
+    private static void OnSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        ImageIcon self = (ImageIcon)d;
+
+        if(self.Image is null)
+        {
+            return;
+        }
+
+        self.Image.SetCurrentValue(System.Windows.Controls.Image.SourceProperty, (ImageSource?)e.NewValue);
+    }
+
+    protected override UIElement InitializeChildren()
+    {
+        Image = new System.Windows.Controls.Image() { Source = Source, Stretch = Stretch.UniformToFill };
+
+        return Image;
+    }
+
+    protected System.Windows.Controls.Image? Image { get; set; }
+
+    /// <summary>
+    /// Gets or sets the Source on this Image.
+    /// </summary>
+    public ImageSource? Source
+    {
+        get => (ImageSource?)GetValue(SourceProperty);
+        set => SetValue(SourceProperty, value);
+    }
+}