优化更新代码，添加界面功能并整合

WPFluent/Controls/FluentWindowEx/FluentWindowEx.cs

@@ -0,0 +1,40 @@
+
+namespace WPFluent.Controls;
+
+public class FluentWindowEx : FluentWindow
+{
+    public static readonly DependencyProperty TitleIconProperty =
+        DependencyProperty.Register(
+        nameof(TitleIcon),
+        typeof(IconElement),
+        typeof(FluentWindowEx),
+        new PropertyMetadata(null));
+
+    static FluentWindowEx()
+    {
+        DefaultStyleKeyProperty.OverrideMetadata(
+            typeof(FluentWindowEx),
+            new FrameworkPropertyMetadata(typeof(FluentWindowEx)));
+    }
+
+    public FluentWindowEx()
+    {
+        //将指定的属性与资源字典中的资源关联起来
+        SetResourceReference(StyleProperty, typeof(FluentWindowEx));
+    }
+
+    public IconElement TitleIcon
+    {
+        get { return (IconElement)GetValue(TitleIconProperty); }
+        set { SetValue(TitleIconProperty, value); }
+    }
+
+    //public override void OnApplyTemplate()
+    //{
+    //    base.OnApplyTemplate();
+    //    var resources = Application.Current.Resources;
+    //    var style = Application.Current.FindResource("DefaultFluentWindowExStyle");
+    //    var style1 = Application.Current.FindResource(typeof(FluentWindowEx));
+    //    this.Style = (Style)FindResource(typeof(FluentWindowEx));
+    //}
+}