添加项目文件。

Util.DiagramDesigner/Models/DesignerItemBase.cs

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+using Util.DiagramDesigner;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+using System.Xml.Serialization;
+
+namespace Util.DiagramDesigner
+{
+    [Serializable]
+    [XmlInclude(typeof(DesignerItemBase))]
+    public class DesignerItemBase : SelectableDesignerItemBase
+    {
+        public DesignerItemBase()
+        {
+
+        }
+
+        public DesignerItemBase(DesignerItemViewModelBase viewmodel, string reserve = null) : base(viewmodel)
+        {
+            this.Left = viewmodel.Left;
+            this.Top = viewmodel.Top;
+            this.Angle = viewmodel.Angle;
+            this.ScaleX = viewmodel.ScaleX;
+            this.ScaleY = viewmodel.ScaleY;
+            this.ItemWidth = viewmodel.ItemWidth;
+            this.ItemHeight = viewmodel.ItemHeight;
+            this.Icon = viewmodel.Icon;
+            this.ItemTypeName = viewmodel.GetType().FullName;
+            this.Margin = viewmodel.Margin;
+            this.Reserve = reserve;
+        }
+
+        [XmlAttribute]
+        public double Left { get; set; }
+
+        [XmlAttribute]
+        public double Top { get; set; }
+
+        [XmlAttribute]
+        public double Angle { get; set; }
+
+        [XmlAttribute]
+        public double ScaleX { get; set; }
+
+        [XmlAttribute]
+        public double ScaleY { get; set; }
+
+        [XmlAttribute]
+        public double Margin { get; set; }
+
+        [XmlAttribute]
+        public double ItemWidth { get; set; }
+
+        [XmlAttribute]
+        public double ItemHeight { get; set; }
+
+        [XmlAttribute]
+        public string Icon { get; set; }
+
+        [XmlAttribute]
+        public string Reserve { get; set; }
+
+        [XmlAttribute]
+        public string ItemTypeName { get; set; }
+
+    }
+
+
+}