diff --git a/PacticeSolution/MVVMCanvasRectangle/App.xaml b/PacticeSolution/MVVMCanvasRectangle/App.xaml
new file mode 100644
index 0000000..689121f
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/App.xaml
@@ -0,0 +1,9 @@
+<Application x:Class="MVVMCanvasRectangle.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:MVVMCanvasRectangle"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
diff --git a/PacticeSolution/MVVMCanvasRectangle/App.xaml.cs b/PacticeSolution/MVVMCanvasRectangle/App.xaml.cs
new file mode 100644
index 0000000..01a35bb
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/App.xaml.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace MVVMCanvasRectangle
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}
diff --git a/PacticeSolution/MVVMCanvasRectangle/AssemblyInfo.cs b/PacticeSolution/MVVMCanvasRectangle/AssemblyInfo.cs
new file mode 100644
index 0000000..8b5504e
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/AssemblyInfo.cs
@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
diff --git a/PacticeSolution/MVVMCanvasRectangle/MVVMCanvasRectangle.csproj b/PacticeSolution/MVVMCanvasRectangle/MVVMCanvasRectangle.csproj
new file mode 100644
index 0000000..4106cb0
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/MVVMCanvasRectangle.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+</Project>
diff --git a/PacticeSolution/MVVMCanvasRectangle/MainWindow.xaml b/PacticeSolution/MVVMCanvasRectangle/MainWindow.xaml
new file mode 100644
index 0000000..87bf29b
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/MainWindow.xaml
@@ -0,0 +1,35 @@
+<Window x:Class="MVVMCanvasRectangle.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:MVVMCanvasRectangle" xmlns:viewmodel="clr-namespace:MVVMCanvasRectangle.ViewModel"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="200" Width="600">
+
+    <Window.DataContext>
+        <viewmodel:RectModelView/>
+    </Window.DataContext>
+
+    <StackPanel>
+        <TextBox x:Name="txtCount" HorizontalAlignment="Center" Margin="5" Width="100" Text="{Binding Count, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
+        <ItemsControl x:Name="itcMain" ItemsSource="{Binding RectItems}" Height="150" Margin="5">
+            <ItemsControl.ItemsPanel>
+                <ItemsPanelTemplate>
+                    <Canvas/>
+                </ItemsPanelTemplate>
+            </ItemsControl.ItemsPanel>
+            <ItemsControl.ItemContainerStyle>
+                <Style TargetType="ContentPresenter">
+                    <Setter Property="Canvas.Left" Value="{Binding X}"/>
+                    <Setter Property="Canvas.Top" Value="{Binding Y}"/>
+                </Style>
+            </ItemsControl.ItemContainerStyle>
+            <ItemsControl.ItemTemplate>
+                <DataTemplate>
+                    <Rectangle Width="{Binding Width}" Height="{Binding Height}" Fill="LightCoral"/>
+                </DataTemplate>
+            </ItemsControl.ItemTemplate>
+        </ItemsControl>
+    </StackPanel>
+</Window>
diff --git a/PacticeSolution/MVVMCanvasRectangle/MainWindow.xaml.cs b/PacticeSolution/MVVMCanvasRectangle/MainWindow.xaml.cs
new file mode 100644
index 0000000..7ed4111
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/MainWindow.xaml.cs
@@ -0,0 +1,64 @@
+using MVVMCanvasRectangle.ViewModel;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Timers;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+using System.Windows.Threading;
+
+namespace MVVMCanvasRectangle
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        private System.Timers.Timer _timer;
+
+        public MainWindow()
+        {
+            InitializeComponent();
+
+            _timer = new System.Timers.Timer();
+            _timer.Interval = 1000;
+            _timer.Elapsed -= _timer_Elapsed;
+            _timer.Elapsed += _timer_Elapsed;
+            _timer.Start();
+        }
+
+        private void _timer_Elapsed(object? sender, ElapsedEventArgs e)
+        {
+            if (this.Dispatcher.Thread != Thread.CurrentThread)
+            {
+                this.Dispatcher.Invoke(DispatcherPriority.Normal, () =>
+                {
+                    AddOneRect();
+                });
+            }
+            else
+            {
+                AddOneRect();
+            }
+        }
+
+        private void AddOneRect()
+        {
+            RectModelView dataContext = this.DataContext as RectModelView;
+            if (dataContext == null)
+                return;
+
+            dataContext.AddOne();
+        }
+    }
+}
diff --git a/PacticeSolution/MVVMCanvasRectangle/Model/RectItem.cs b/PacticeSolution/MVVMCanvasRectangle/Model/RectItem.cs
new file mode 100644
index 0000000..5515ff0
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/Model/RectItem.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVVMCanvasRectangle.Model
+{
+    internal class RectItem
+    {
+        public double X { get; set; }
+        public double Y { get; set; }
+        public double Width { get; set; }
+        public double Height { get; set; }
+    }
+}
diff --git a/PacticeSolution/MVVMCanvasRectangle/ViewModel/RectModelView.cs b/PacticeSolution/MVVMCanvasRectangle/ViewModel/RectModelView.cs
new file mode 100644
index 0000000..63aade6
--- /dev/null
+++ b/PacticeSolution/MVVMCanvasRectangle/ViewModel/RectModelView.cs
@@ -0,0 +1,48 @@
+using MVVMCanvasRectangle.Model;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVVMCanvasRectangle.ViewModel
+{
+    internal class RectModelView : INotifyPropertyChanged
+    {
+        private int _count;
+        public ObservableCollection<RectItem> RectItems { get; set; }
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        public int Count
+        {
+            get { return _count; }
+            set
+            {
+                _count = value;
+                this.RectItems.Clear();
+                for (int i = 0; i < _count; i++)
+                {
+                    this.RectItems.Add(new RectItem { X = i * 40, Y = 10, Width = 30, Height = 30 });
+                }
+            }
+        }
+
+        public RectModelView()
+        {
+            _count = 0;
+            this.RectItems = new ObservableCollection<RectItem>();
+        }
+
+        public void AddOne()
+        {
+            RectItem lastRect = this.RectItems.LastOrDefault();
+            if (lastRect == null)
+                this.RectItems.Add(new RectItem() { X = 0, Y = 10, Width = 30, Height = 30 });
+            else
+                this.RectItems.Add(new RectItem() { X = lastRect.X + 40, Y = 10, Width = 30, Height = 30 });
+        }
+    }
+}
diff --git a/PacticeSolution/PacticeSolution.sln b/PacticeSolution/PacticeSolution.sln
index 9a164e9..6dec7ca 100644
--- a/PacticeSolution/PacticeSolution.sln
+++ b/PacticeSolution/PacticeSolution.sln
@@ -19,6 +19,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MVVMDatabaseSample", "MVVMD
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MVVMTextInputDetection", "MVVMTextInputDetection\MVVMTextInputDetection.csproj", "{C55A5081-B142-4120-8F62-3991276EF5C2}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MVVMCanvasRectangle", "MVVMCanvasRectangle\MVVMCanvasRectangle.csproj", "{C7A96511-E6B9-4F80-9C7B-3ABF4FC0AA4B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -57,6 +59,10 @@ Global
 		{C55A5081-B142-4120-8F62-3991276EF5C2}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{C55A5081-B142-4120-8F62-3991276EF5C2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{C55A5081-B142-4120-8F62-3991276EF5C2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C7A96511-E6B9-4F80-9C7B-3ABF4FC0AA4B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C7A96511-E6B9-4F80-9C7B-3ABF4FC0AA4B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C7A96511-E6B9-4F80-9C7B-3ABF4FC0AA4B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C7A96511-E6B9-4F80-9C7B-3ABF4FC0AA4B}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE