diff --git a/labs/NestedSetModelTest/.gitignore b/labs/NestedSetModelTest/.gitignore
new file mode 100644
index 00000000..988994ff
--- /dev/null
+++ b/labs/NestedSetModelTest/.gitignore
@@ -0,0 +1,16 @@
+*.bak
+*.suo
+*.db
+*.user
+.vs
+obj
+Obj
+bin
+Bin
+debug
+Debug
+release
+Release
+Logs
+logs
+node_modules
\ No newline at end of file
diff --git a/labs/NestedSetModelTest/BaseTreeEntity.cs b/labs/NestedSetModelTest/BaseTreeEntity.cs
new file mode 100644
index 00000000..07f64a7f
--- /dev/null
+++ b/labs/NestedSetModelTest/BaseTreeEntity.cs
@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+
+namespace NestedSetModelTest
+{
+    public class EntityBase<TKey>
+    {
+        public TKey Id { get; set; }
+        public string IsDeleted { get; set; }
+
+        public override string ToString()
+        {
+            return $"{ GetType().FullName}[{Id}]";
+        }
+    }
+
+    public abstract class BaseEntity : EntityBase<Guid>
+    {
+        public BaseEntity()
+        {
+            this.Id = Guid.NewGuid();
+        }
+    }
+
+    public abstract class BaseTreeEntity<T> : BaseEntity where T : BaseTreeEntity<T>
+    {
+        public int DisplayOrder { get; set; }
+        public int Left { get; set; }
+        public int Right { get; set; }
+        public Guid? ParentId { get; set; }
+        public T Parent { get; set; }
+#pragma warning disable CA2227 // 集合属性应为只读
+        public List<T> Children { get; set; } = new List<T>();
+#pragma warning restore CA2227 // 集合属性应为只读
+
+        public List<T> GetPath()
+        {
+            var list = new List<T>();
+            var item = this as T;
+            while (item != null)
+            {
+                list.Add(item);
+                if (item.Parent == null || item.Parent.Id == this.Id)
+                {
+                    break;
+                }
+                item = item.Parent;
+            }
+            list.Reverse();
+            return list;
+        }
+    }
+
+    public class Node : BaseTreeEntity<Node>
+    {
+        public string Name { get; set; }
+        public string Number { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/labs/NestedSetModelTest/NestedSetModelTest.csproj b/labs/NestedSetModelTest/NestedSetModelTest.csproj
new file mode 100644
index 00000000..c73e0d16
--- /dev/null
+++ b/labs/NestedSetModelTest/NestedSetModelTest.csproj
@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>
diff --git a/labs/NestedSetModelTest/NestedSetModelTest.sln b/labs/NestedSetModelTest/NestedSetModelTest.sln
new file mode 100644
index 00000000..9c55ae65
--- /dev/null
+++ b/labs/NestedSetModelTest/NestedSetModelTest.sln
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30717.126
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NestedSetModelTest", "NestedSetModelTest.csproj", "{37D9722F-9B16-481C-AEC0-35553CD13575}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{37D9722F-9B16-481C-AEC0-35553CD13575}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{37D9722F-9B16-481C-AEC0-35553CD13575}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{37D9722F-9B16-481C-AEC0-35553CD13575}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{37D9722F-9B16-481C-AEC0-35553CD13575}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {9C3B8285-8771-4F47-89D3-A4B9BD41B469}
+	EndGlobalSection
+EndGlobal
diff --git a/labs/NestedSetModelTest/Program.cs b/labs/NestedSetModelTest/Program.cs
new file mode 100644
index 00000000..18be6dc7
--- /dev/null
+++ b/labs/NestedSetModelTest/Program.cs
@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace NestedSetModelTest
+{
+    internal class Program
+    {
+        private static List<Node> list = new List<Node>();
+
+        private static void Main(string[] args)
+        {
+            var root = CreateTree();
+            Add(root);
+            var i = 1;
+            foreach (var item in list)
+            {
+                item.Left = i++;
+            }
+            list.Reverse();
+            foreach (var item in list)
+            {
+                item.Right = i++;
+            }
+            list.Reverse();
+            foreach (var item in list)
+            {
+                Console.WriteLine($"{item.Name}:{item.Number},{item.Left}-{item.Right}");
+            }
+        }
+
+        private static void Add(Node node)
+        {
+            list.Add(node);
+            if (node.Children.Any())
+            {
+                foreach (var item in node.Children.OrderBy(o => o.DisplayOrder))
+                {
+                    Add(item);
+                }
+            }
+        }
+
+        private static Node CreateTree()
+        {
+            var root = new Node
+            {
+                Name = "root",
+                Number = "1-18",
+                Children = new List<Node> {
+                    new Node{
+                        Name="Fruit",
+                        Number="2-11",
+                        Children=new List<Node>{
+                            new Node{
+                                Name="Red",
+                                Number="3-6",
+                                Children=new List<Node>
+                                {
+                                    new Node{
+                                        Name="Cherry",
+                                        Number="4-5"
+                                    }
+                                }
+                            },
+                            new Node{
+                                Name="Yellow",
+                                Number="7-10",
+                                DisplayOrder=1,
+                                Children=new List<Node>
+                                {
+                                    new Node{
+                                        Name="Banana",
+                                        Number="8-9"
+                                    }
+                                }
+                            }
+                        }
+                    },
+                    new Node{
+                        Name="Meat",
+                        Number="12-17",
+                        DisplayOrder=1,
+                        Children=new List<Node>{
+                            new Node{
+                                Name="Beef",
+                                Number="13-14"
+                            },
+                            new Node{
+                                Name="Port",
+                                Number="15-16",
+                                DisplayOrder=1,
+                            }
+                        }
+                    }
+                }
+            };
+            return root;
+        }
+    }
+}
\ No newline at end of file