diff --git a/PacticeSolution/MVVMDatabaseSample/ViewModel/ViewModelMain.cs b/PacticeSolution/MVVMDatabaseSample/ViewModel/ViewModelMain.cs
index 4b5aafd..5ec098f 100644
--- a/PacticeSolution/MVVMDatabaseSample/ViewModel/ViewModelMain.cs
+++ b/PacticeSolution/MVVMDatabaseSample/ViewModel/ViewModelMain.cs
@@ -122,6 +122,8 @@ namespace MVVMDatabaseSample.ViewModel
 
         private void Select()
         {
+            _sampleData.Clear();
+
             DataSet ds = new DataSet();
             string qry = "SELECT * FROM Student";
             SqlDBManager.Instance.ExecuteQuery(ds, qry);
diff --git a/PacticeSolution/MVVMTextInputDetection/App.xaml b/PacticeSolution/MVVMTextInputDetection/App.xaml
new file mode 100644
index 0000000..758f7f9
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/App.xaml
@@ -0,0 +1,9 @@
+<Application x:Class="MVVMTextInputDetection.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:MVVMTextInputDetection"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
diff --git a/PacticeSolution/MVVMTextInputDetection/App.xaml.cs b/PacticeSolution/MVVMTextInputDetection/App.xaml.cs
new file mode 100644
index 0000000..2b1c743
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/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 MVVMTextInputDetection
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}
diff --git a/PacticeSolution/MVVMTextInputDetection/AssemblyInfo.cs b/PacticeSolution/MVVMTextInputDetection/AssemblyInfo.cs
new file mode 100644
index 0000000..8b5504e
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/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/MVVMTextInputDetection/MVVMTextInputDetection.csproj b/PacticeSolution/MVVMTextInputDetection/MVVMTextInputDetection.csproj
new file mode 100644
index 0000000..4106cb0
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/MVVMTextInputDetection.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/MVVMTextInputDetection/MainWindow.xaml b/PacticeSolution/MVVMTextInputDetection/MainWindow.xaml
new file mode 100644
index 0000000..5d63829
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/MainWindow.xaml
@@ -0,0 +1,19 @@
+<Window x:Class="MVVMTextInputDetection.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:MVVMTextInputDetection" xmlns:viewmodel="clr-namespace:MVVMTextInputDetection.ViewModel"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="200" Width="200">
+
+    <Window.DataContext>
+        <viewmodel:CalculateViewModel/>
+    </Window.DataContext>
+
+    <Grid>
+        <TextBox x:Name="tbxNumber" HorizontalAlignment="Center" VerticalAlignment="Center" Width="100" Margin="5"
+                 Text="{Binding Number, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                 TextWrapping="Wrap" TextAlignment="Center"/>
+    </Grid>
+</Window>
diff --git a/PacticeSolution/MVVMTextInputDetection/MainWindow.xaml.cs b/PacticeSolution/MVVMTextInputDetection/MainWindow.xaml.cs
new file mode 100644
index 0000000..658c1af
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/MainWindow.xaml.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+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;
+
+namespace MVVMTextInputDetection
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+        }
+    }
+}
diff --git a/PacticeSolution/MVVMTextInputDetection/Model/Calculate.cs b/PacticeSolution/MVVMTextInputDetection/Model/Calculate.cs
new file mode 100644
index 0000000..5a05e64
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/Model/Calculate.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MVVMTextInputDetection.Model
+{
+    class Calculate
+    {
+        public int Number { get; set; }
+    }
+}
diff --git a/PacticeSolution/MVVMTextInputDetection/ViewModel/CalculateViewModel.cs b/PacticeSolution/MVVMTextInputDetection/ViewModel/CalculateViewModel.cs
new file mode 100644
index 0000000..9501034
--- /dev/null
+++ b/PacticeSolution/MVVMTextInputDetection/ViewModel/CalculateViewModel.cs
@@ -0,0 +1,46 @@
+using MVVMTextInputDetection.Model;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace MVVMTextInputDetection.ViewModel
+{
+    class CalculateViewModel : INotifyPropertyChanged
+    {
+        public Calculate CalculateModel { get; set; }
+
+        public event PropertyChangedEventHandler? PropertyChanged;
+
+        public CalculateViewModel()
+        {
+            this.CalculateModel = new Calculate();
+        }
+
+        public int Number
+        {
+            get { return this.CalculateModel.Number; }
+            set
+            {
+                CalculateModel.Number = value;
+                OnPropertyChanged("Number");
+
+                CheckNumberRange(this.CalculateModel.Number);
+            }
+        }
+
+        private void CheckNumberRange(int number)
+        {
+            if (number > 99 || number < 0)
+                MessageBox.Show("Number range exceeded!");
+        }
+
+        protected void OnPropertyChanged(string propertyName)
+        {
+            this.PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}
diff --git a/PacticeSolution/PacticeSolution.sln b/PacticeSolution/PacticeSolution.sln
index bf40cb8..9a164e9 100644
--- a/PacticeSolution/PacticeSolution.sln
+++ b/PacticeSolution/PacticeSolution.sln
@@ -9,13 +9,15 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ClockGadget", "ClockGadget\
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MapFinder", "MapFinder\MapFinder.csproj", "{4FCEAEAA-6A26-492F-95D1-9695F386DAB5}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DataBindingSample", "DataBindingSample\DataBindingSample.csproj", "{8A3E4E38-6E95-4955-8BFE-6E58F4AECE27}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DataBindingSample", "DataBindingSample\DataBindingSample.csproj", "{8A3E4E38-6E95-4955-8BFE-6E58F4AECE27}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MVVMSample", "MVVMSample\MVVMSample.csproj", "{FFD799B6-18C5-413B-8984-B44C803473B0}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MVVMSample", "MVVMSample\MVVMSample.csproj", "{FFD799B6-18C5-413B-8984-B44C803473B0}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ResourceSample", "ResourceSample\ResourceSample.csproj", "{858EC308-9ABD-44C1-92E1-59911F60FEB9}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ResourceSample", "ResourceSample\ResourceSample.csproj", "{858EC308-9ABD-44C1-92E1-59911F60FEB9}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MVVMDatabaseSample", "MVVMDatabaseSample\MVVMDatabaseSample.csproj", "{B0A8E6DE-C6A2-488E-A148-9E7812F615F2}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MVVMDatabaseSample", "MVVMDatabaseSample\MVVMDatabaseSample.csproj", "{B0A8E6DE-C6A2-488E-A148-9E7812F615F2}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MVVMTextInputDetection", "MVVMTextInputDetection\MVVMTextInputDetection.csproj", "{C55A5081-B142-4120-8F62-3991276EF5C2}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -51,6 +53,10 @@ Global
 		{B0A8E6DE-C6A2-488E-A148-9E7812F615F2}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B0A8E6DE-C6A2-488E-A148-9E7812F615F2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B0A8E6DE-C6A2-488E-A148-9E7812F615F2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C55A5081-B142-4120-8F62-3991276EF5C2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{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
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE