Here is UserApp.xaml file, while project running the program, XamlParseException is summoned, and program doesn't compile fully

Question

I'm encountering an issue while attempting to get this code working smoothly, as shown in a C# WPF tutorial for creating a registration menu (which is now three years old; hopefully, it's still relevant). I'm struggling with handling an exception and would appreciate some guidance.

The issue revolves around a detailed exception, "System.Windows.Markup.XamlParseException," causing the program to halt in XamlReader.cs with an error as follows:

Here's the full exception stack: `System.Windows.Markup.XamlParseException HResult=0x80131501 Message="Calling a constructor for type 'UsersApp.MainWindow' that satisfies the specified binding constraints resulted in an exception being thrown.': line number '8' and line position '9'.. Source=PresentationFramework StackTrace: at System.Windows.Markup.XamlReader.RewrapException(Exception e, IXamlLineInfo lineInfo, Uri baseUri) in System.Windows.Markup\XamlReader.cs:line 405

This exception was originally thrown at this call stack: System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(bool) System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(System.Configuration.ConfigurationSchemaErrors) System.Configuration.ClientConfigurationSystem.EnsureInit(string)

Inner Exception 1: TypeInitializationException: The type initializer for 'System.Data.Entity.Internal.AppConfig' threw an exception.

Inner Exception 2: ConfigurationErrorsException: Configuration system failed to initialize

Inner Exception 3: ConfigurationErrorsException: Unrecognized configuration section system.data. (C:\Users\nikit\OneDrive\Рабочий стол\University\University_KHPI_secondyear_2-1\C#_General\C#_Youtube_Course_Projects\C#_WPF\WPF-in-VisualStudio2022\UsersApp\bin\Debug\net7.0-windows\UsersApp.dll.config line 26)

`

Additionally, here are sections of the project that might be causing this exception:

MainWindow.xaml:

    <Window x:Class="UsersApp.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:UsersApp"
        mc:Ignorable="d"
        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
        Title="Application for users" Height="600" Width="800">
        <Grid Background="#ffdadada">
            <Border MinWidth="400" Margin="15" Background="white" VerticalAlignment="Center" Padding="30" MaxWidth="550" CornerRadius="20">
                <Border.Effect>
                    <DropShadowEffect BlurRadius="30" Color="LightGray" ShadowDepth="0" />
                </Border.Effect>
                <StackPanel>
                    <TextBlock Text="Hello you!" FontSize="30" FontWeight="Bold" Margin="0 0 0 20" />
                    <TextBlock x:Name="exampleText"  FontWeight="Bold" Margin="0 0 0 20" />
                
                    <Grid Margin = "0 0 0 20">
                        <Button HorizontalAlignment="Left" Content="Registration" />
                        <Button HorizontalAlignment="Right" Content="Log in" Style="{StaticResource MaterialDesignFlatButton}" />
                    </Grid>

                    <TextBox x:Name="textBoxLogin" materialDesign:HintAssist.Hint="Enter login" Style="{StaticResource MaterialDesignFloatingHintTextBox}" />
                    <PasswordBox x:Name="passBox" materialDesign:HintAssist.Hint="Enter password" Style="{StaticResource MaterialDesignFloatingHintPasswordBox}"/>
                    <PasswordBox x:Name="passBox_2" materialDesign:HintAssist.Hint="Repeat password" Style="{StaticResource MaterialDesignFloatingHintPasswordBox}" />
                    <TextBox x:Name="textBoxEmail" materialDesign:HintAssist.Hint="Email" Style="{StaticResource MaterialDesignFloatingHintTextBox}" />
                    <Button Content="Register now!" Margin="0 20 " Click="Button_Rag_Click" />
                </StackPanel>
            </Border>
        </Grid>
    </Window>

MainWindow.xaml.cs:

    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 UsersApp
    {
        /// <summary>
        /// Interaction logic for MainWindow.xaml
        /// </summary>
        public partial class MainWindow : Window
        {
            ApplicationContext db = new ApplicationContext();


            public MainWindow()
            {
            
                InitializeComponent();

                List<User> users = db.Users.ToList();
                string str = "";
                foreach (User user in users)
                {
                    str += "Login: " + user.Login + " | ";
                }

                exampleText.Text = str;
            }

            private void Button_Rag_Click(object sender, RoutedEventArgs e)
            {
                string login = textBoxLogin.Text.Trim(); //deleting spaces
                string pass = passBox.Password.Trim();
                string pass_2 = passBox_2.Password.Trim();
                string email = textBoxEmail.Text.Trim().ToLower();
    
                if (login.Length < 5)
                {
                    textBoxLogin.ToolTip = "This line is incorrect!";
                    textBoxLogin.Background = Brushes.DarkRed;
                } else if (pass.Length < 5)
                {
                    passBox.ToolTip = "This line is incorrect!";
                    passBox.Background = Brushes.DarkRed;
                } else if (pass != pass_2)
                {
                    passBox_2.ToolTip = "This line is incorrect!";
                    passBox_2.Background = Brushes.DarkRed;
                } else if (email.Length < 5 || !email.Contains("@") || !email.Contains("."))
                {
                    textBoxEmail.ToolTip = "This line is incorrect!";
                    textBoxEmail.Background = Brushes.DarkRed;
                } else
                {
                    textBoxLogin.ToolTip = "";
                    textBoxLogin.Background = Brushes.Transparent;
                    passBox.ToolTip = "";
                    passBox.Background = Brushes.Transparent;
                    passBox_2.ToolTip = "";
                    passBox_2.Background = Brushes.Transparent;
                    textBoxEmail.ToolTip = "";
                    textBoxEmail.Background = Brushes.Transparent;

                    MessageBox.Show("Excellent!");
                    User user = new User(login, email, pass);
                    db.Users.Add(user);
                    db.SaveChanges();
                }
            }
        }
    }

User.cs:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;

    namespace UsersApp
    {
        internal class User
        {

            public int Id { get; set; }
            private string login, email, pass;

            public string Login
            {
                get { return login; }
                set { login = value; }
            }

            public string Email
            {
                get { return email; }
                set { email = value; }
            }

            public string Pass
            {
                get { return pass; }
                set { pass = value; }
            }

            public User() { }

            public User(string login, string email, string pass)
            {
                this.login = login;
                this.email = email;
                this.pass = pass;
            }

        }
    }

App.xaml:

        <Application x:Class="UsersApp.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:UsersApp"
             StartupUri="MainWindow.xaml">
        <Application.Resources>
            <ResourceDictionary>
                <ResourceDictionary.MergedDictionaries>
                    <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml" />
                    <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
                    <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.DeepPurple.xaml" />
                    <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Lime.xaml" />
                </ResourceDictionary.MergedDictionaries>
            </ResourceDictionary>
        </Application.Resources>
    </Application>

UsersApp.dll.config:

     <?xml version="1.0" encoding="utf-8"?>
    <configuration>
      <configSections>
        <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
        <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
      </configSections>
      <!-- Если не работает, то сделайте следующее. Замените все содержимое файла, но объект startup установите такой же, как был у вас ранее  -->
      <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
      </startup>
      <connectionStrings>
        <add name="DefaultConnection" connectionString="Data Source=.\itproger.db" providerName="System.Data.SQLite" />
      </connectionStrings>
      <entityFramework>
        <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
          <parameters>
            <parameter value="v11.0" />
          </parameters>
        </defaultConnectionFactory>
        <providers>
          <provider invariantName="System.Data.SQLite"  type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6"/>
          <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
          <provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
        </providers>
      </entityFramework>
      <system.data>
        <DbProviderFactories>
          <add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
          <add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
        </DbProviderFactories>
      </system.data>
    </configuration>

ApplicationContext.cs:

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Data.Entity;

    namespace UsersApp
    {
        // С помощью этого класса мы сможем
        // подключаться с необходимой базой данных
        internal class ApplicationContext : DbContext
        {
            public DbSet<User> Users { get; set; }
    
            public ApplicationContext() : base("DefaultConnection") { }
        }
    }

For instance, here is a screenshot of SolutionExplorer:

I've attempted to wrap suspicious methods within try/catch structures, particularly related to the database variable. Additionally, I've double-checked the correctness of the paths in the configuration file for the database and the "<system.data>" tags.

My expectation was to resolve the XamlParse Exception, allowing the program to register users and send data to the SQLite database.