调整了一下各种命令的位置，便于其他应用调用

AIStudio.Wpf.DiagramDesigner/Helpers/XmlSerializeHelper.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Serialization;
+
+namespace AIStudio.Wpf.DiagramDesigner.Helpers
+{
+    public class XmlSerializeHelper
+    {
+        public static string XmlSerialize<T>(T obj)
+        {
+            using (StringWriter sw = new StringWriter())
+            {
+                Type t = obj.GetType();
+                XmlSerializer serializer = new XmlSerializer(obj.GetType());
+                serializer.Serialize(sw, obj);
+                sw.Close();
+                return sw.ToString();
+            }
+        }
+
+        public static T DESerializer<T>(string strXML) where T : class
+        {
+            try
+            {
+                using (StringReader sr = new StringReader(strXML))
+                {
+                    XmlSerializer serializer = new XmlSerializer(typeof(T));
+                    return serializer.Deserialize(sr) as T;
+                }
+            }
+            catch (Exception ex)
+            {
+                return null;
+            }
+        }
+    }
+}