更新

WPFDark/Controls/BiaIconToggleButton.xaml.cs

@@ -0,0 +1,53 @@
+using System.Windows;
+
+namespace WPFDark.Controls
+{
+    public class BiaIconToggleButton : BiaIconButton
+    {
+        #region IsChecked
+
+        public bool IsChecked
+        {
+            get => _IsChecked;
+            set
+            {
+                if (value != _IsChecked)
+                    SetValue(IsCheckedProperty, value);
+            }
+        }
+
+        private bool _IsChecked;
+
+        public static readonly DependencyProperty IsCheckedProperty =
+            DependencyProperty.Register(nameof(IsChecked), typeof(bool), typeof(BiaIconToggleButton),
+                new FrameworkPropertyMetadata(
+                    false,
+                    FrameworkPropertyMetadataOptions.BindsTwoWayByDefault |
+                    FrameworkPropertyMetadataOptions.AffectsRender |
+                    FrameworkPropertyMetadataOptions.SubPropertiesDoNotAffectRender,
+                    (s, e) =>
+                    {
+                        var self = (BiaIconToggleButton) s;
+                        self._IsChecked = (bool) e.NewValue;
+                    })
+                {
+                    BindsTwoWayByDefault = true
+                }
+            );
+
+        #endregion
+
+        static BiaIconToggleButton()
+        {
+            DefaultStyleKeyProperty.OverrideMetadata(typeof(BiaIconToggleButton),
+                new FrameworkPropertyMetadata(typeof(BiaIconToggleButton)));
+        }
+
+        protected override void Clicked()
+        {
+            IsChecked = !IsChecked;
+
+            base.Clicked();
+        }
+    }
+}