重写了节点的view、viewmodel关系，实现了对画布元素的选取功能，重构了底层依赖，添加了对net .Framework4.6.1以上的Framework类库支持

Library/NodeAttribute.cs

@@ -0,0 +1,49 @@
+using Serein.Library.Enums;
+using System;
+
+namespace Serein.Library.Attributes
+{
+    /// <summary>
+    /// 表示该属性为自动注入依赖项
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Property)]
+    public sealed class AutoInjectionAttribute : Attribute
+    {
+    }
+
+    /// <summary>
+    /// 用来判断一个类是否需要注册并构建实例（单例模式场景使用）
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]
+    public class DynamicFlowAttribute : Attribute
+    {
+        public DynamicFlowAttribute(bool scan = true)
+        {
+            Scan = scan;
+        }
+        public bool Scan { get; set; } = true;
+    }
+
+    /// <summary>
+    /// 标记一个方法是什么类型，加载dll后用来拖拽到画布中
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
+    public class NodeActionAttribute : Attribute
+    {
+        public NodeActionAttribute(NodeType methodDynamicType,
+                                       string methodTips = "",
+                                       bool scan = true,
+                                       string lockName = "")
+        {
+            Scan = scan;
+            MethodDynamicType = methodDynamicType;
+            MethodTips = methodTips;
+            LockName = lockName;
+        }
+        public bool Scan { get; set; }
+        public string MethodTips { get; }
+        public NodeType MethodDynamicType { get; }
+        public string LockName { get; }
+    }
+
+}