重构中day1，写了很多，不知道怎么说清楚

Workbench/Views/BaseNodesView.xaml.cs

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+using Serein.Library;
+using Serein.Workbench.ViewModels;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace Serein.Workbench.Views
+{
+    /// <summary>
+    /// BaseNodesView.xaml 的交互逻辑
+    /// </summary>
+    public partial class BaseNodesView : UserControl
+    {
+        public BaseNodesView()
+        {
+            this.DataContext = App.GetService<Locator>().BaseNodesViewModel;
+            InitializeComponent();
+        }
+
+        /// <summary>
+        /// 基础节点的拖拽放置创建
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void BaseNodeControl_PreviewMouseMove(object sender, MouseEventArgs e)
+        {
+            if (sender is UserControl control)
+            {
+                if (e.LeftButton == MouseButtonState.Pressed)
+                {
+                    // 创建一个 DataObject 用于拖拽操作，并设置拖拽效果
+                    var dragData = new DataObject(MouseNodeType.CreateBaseNodeInCanvas, control.GetType());
+                    try
+                    {
+                        DragDrop.DoDragDrop(control, dragData, DragDropEffects.Move);
+                    }
+                    catch (Exception ex)
+                    {
+                        SereinEnv.WriteLine(ex);
+                    }
+                }
+
+            }
+        }
+    }
+}