diff --git a/AIStudio.Wpf.DiagramDesigner.Additionals/AIStudio.Wpf.DiagramDesigner.Additionals.csproj b/AIStudio.Wpf.DiagramDesigner.Additionals/AIStudio.Wpf.DiagramDesigner.Additionals.csproj
index f9ad509..aa26978 100644
--- a/AIStudio.Wpf.DiagramDesigner.Additionals/AIStudio.Wpf.DiagramDesigner.Additionals.csproj
+++ b/AIStudio.Wpf.DiagramDesigner.Additionals/AIStudio.Wpf.DiagramDesigner.Additionals.csproj
@@ -9,7 +9,7 @@
     <PackageIcon>A.png</PackageIcon>
     <PackageIconUrl />
     <NeutralLanguage />
-    <Version>1.0.1</Version>
+    <Version>1.1.7</Version>
     <Description>一个Wpf的Diagram控件帮助库</Description>
   </PropertyGroup>
 
diff --git a/AIStudio.Wpf.DiagramDesigner/AIStudio.Wpf.DiagramDesigner.csproj b/AIStudio.Wpf.DiagramDesigner/AIStudio.Wpf.DiagramDesigner.csproj
index 07fd8a4..5c56737 100644
--- a/AIStudio.Wpf.DiagramDesigner/AIStudio.Wpf.DiagramDesigner.csproj
+++ b/AIStudio.Wpf.DiagramDesigner/AIStudio.Wpf.DiagramDesigner.csproj
@@ -8,8 +8,7 @@
     <PackageIcon>A.png</PackageIcon>
     <PackageIconUrl />
     <NeutralLanguage />
-    <Version>1.1.5
-    </Version>
+    <Version>1.1.7</Version>
     <Description>一个Wpf的Diagram控件基础库</Description>
   </PropertyGroup>
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
index 136c5bc..76ce8e5 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
@@ -3346,6 +3346,8 @@ namespace AIStudio.Wpf.DiagramDesigner
                 }
             }
         }
+         
+
         #endregion
 
         public override string ToString()
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemTempLink.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemTempLink.cs
new file mode 100644
index 0000000..3d4690b
--- /dev/null
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemTempLink.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public class BlockDesignerItemTempLink
+    {
+        List<BlockDesignerItemViewModel> Items
+        {
+            get;set;
+        } = new List<BlockDesignerItemViewModel>();
+
+        //public static List<BlockDesignerItemTempLink> Build(List<BlockDesignerItemViewModel> blocks)
+        //{
+        //    List<BlockDesignerItemTempLink> links = new List<BlockDesignerItemTempLink>(){
+        //     new BlockDesignerItemTempLink() };
+
+        //    foreach(var )
+        //}
+    }
+}
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
index 41f9f87..91b41bf 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
@@ -36,16 +36,6 @@ namespace AIStudio.Wpf.DiagramDesigner
             IsReadOnlyText = true;
         }
 
-        public BlockDesignerItemViewModel Next
-        {
-            get; set;
-        }
-
-        public BlockItemsContainerInfo ParentContain
-        {
-            get; set;
-        }
-
         public void AddNext(BlockDesignerItemViewModel next)
         {
             if (this.Next == next)
@@ -91,19 +81,6 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public BlockDesignerItemViewModel GetLastNext()
-        {
-            var next = this.Next;
-            if (next != null)
-            {
-                while (next.Next != null)
-                {
-                    next = next.Next;
-                }
-            }
-            return next;
-        }
-
         public override void AddToSelection(bool selected, bool clearother)
         {
             if (clearother)
@@ -120,11 +97,10 @@ namespace AIStudio.Wpf.DiagramDesigner
             IsSelected = selected;
         }
 
-
         public virtual void AddChild(BlockDesignerItemViewModel child)
         {
             child.RemoveFromSelection();
-            this.GetRootParent.AddToSelection(true, true);
+            this.GetRootContainItem.AddToSelection(true, true);
 
             System.Windows.Application.Current?.Dispatcher.BeginInvoke(new Action(async () => {
                 await Task.Delay(10);
@@ -144,6 +120,24 @@ namespace AIStudio.Wpf.DiagramDesigner
             }));
         }
 
+        public BlockDesignerItemViewModel Prev
+        {
+            get
+            {
+                return Parent as BlockDesignerItemViewModel;
+            }
+        }
+
+        public BlockDesignerItemViewModel Next
+        {
+            get; set;
+        }
+
+        public BlockItemsContainerInfo ParentContain
+        {
+            get; set;
+        }
+
         public ObservableCollection<BlockItemsContainerInfo> Contains
         {
             get; set;
@@ -155,14 +149,40 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 return Contains?.FirstOrDefault();
             }
-        }       
+        }
+
+        public BlockDesignerItemViewModel GetFirst()
+        {
+            var parent = this.Next;
+            if (parent != null)
+            {
+                while (parent.Parent != null)
+                {
+                    parent = parent.Parent as BlockDesignerItemViewModel;
+                }
+            }
+            return parent;
+        }
+
+        public BlockDesignerItemViewModel GetLast()
+        {
+            var next = this;
+            if (next != null)
+            {
+                while (next.Next != null)
+                {
+                    next = next.Next;
+                }
+            }
+            return next;
+        }
 
         public List<BlockItemsContainerInfo> GetAllContain()
         {
             return Contains.SelectMany(p => p.GetAllContain(p.Children, true)).ToList();
         }
 
-        public BlockDesignerItemViewModel GetRootParent
+        public BlockDesignerItemViewModel GetRootContainItem
         {
             get
             {
@@ -172,7 +192,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 }
                 else
                 {
-                    return ParentContain.DataItem.GetRootParent;
+                    return ParentContain.DataItem.GetRootContainItem;
                 }
             }
         }
diff --git a/Directory.Build.Props b/Directory.Build.Props
index 44deea0..2eece1a 100644
--- a/Directory.Build.Props
+++ b/Directory.Build.Props
@@ -1,7 +1,7 @@
 <Project>
   <!-- Project properties -->
   <PropertyGroup>
-    <TargetFrameworks>net6.0-windows</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp3.1;net5.0-windows;net6.0-windows</TargetFrameworks>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">