Projektdateien hinzufügen.

App.xaml

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+<Application x:Class="Lotto1.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:Lotto1"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>

App.xaml.cs

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+using System.Configuration;
+using System.Data;
+using System.Windows;
+
+namespace Lotto1
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+
+}

AssemblyInfo.cs

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+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)
+)]

Lotto1.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net8.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+</Project>

Lotto1.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.13.35931.197 d17.13
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lotto1", "Lotto1.csproj", "{942F020D-B84B-470F-A50B-A8A5B00E0F83}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{942F020D-B84B-470F-A50B-A8A5B00E0F83}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{942F020D-B84B-470F-A50B-A8A5B00E0F83}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{942F020D-B84B-470F-A50B-A8A5B00E0F83}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{942F020D-B84B-470F-A50B-A8A5B00E0F83}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {0BA3A6EA-C1B0-4A86-A8F6-7D56CA80A335}
+	EndGlobalSection
+EndGlobal

MainWindow.xaml

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+<Window x:Class="Lotto_Test.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="Lotto" Height="500" Width="600">
+    <Grid Margin="10">
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto"/>
+            <!-- Überschrift -->
+            <RowDefinition Height="*"/>
+            <!-- Spielfeld -->
+        </Grid.RowDefinitions>
+
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="3*"/>
+            <ColumnDefinition Width="1*"/>
+        </Grid.ColumnDefinitions>
+
+        <TextBlock Text="Lotto – Wähle 6 Zahlen"
+                   FontSize="18" FontWeight="Bold"
+                   HorizontalAlignment="Center"
+                   Grid.ColumnSpan="2" Grid.Row="0" Margin="0,0,0,10"/>
+
+        <WrapPanel x:Name="Feld" Grid.Column="0" Grid.Row="1"/>
+
+        <StackPanel Grid.Column="1" Grid.Row="1" Margin="10,0,0,0">
+            <TextBlock x:Name="GeldText" FontSize="14" Margin="0,0,0,20"/>
+            <Button Content="Ziehung" Click="Ziehung_Click" Margin="0,0,0,10"/>
+            <Button Content="Reset" Click="Reset_Click"/>
+        </StackPanel>
+    </Grid>
+</Window>

MainWindow.xaml.cs

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+using System;
+
+using System.Collections.Generic;
+
+using System.Windows;
+
+using System.Windows.Controls;
+
+using System.Windows.Media;
+
+namespace Lotto_Test
+
+{
+
+    public partial class MainWindow : Window
+
+    {
+
+        List<int> auswahl = new List<int>();
+
+        List<Button> knöpfe = new List<Button>();
+
+        List<int> gezogen = new List<int>();
+
+        double geld = 2000;
+
+        public MainWindow()
+
+        {
+
+            InitializeComponent();
+
+            for (int i = 1; i <= 49; i++)
+
+            {
+
+                Button b = new Button();
+
+                b.Content = i.ToString();
+
+                b.Tag = i;
+
+                b.Width = 35;
+
+                b.Height = 35;
+
+                b.Margin = new Thickness(3);
+
+                b.Background = Brushes.LightGray;
+
+                b.Click += Zahl_Click;
+
+                Feld.Children.Add(b);
+
+                knöpfe.Add(b);
+
+            }
+
+            GeldAktualisieren();
+
+        }
+
+        void Zahl_Click(object sender, RoutedEventArgs e)
+
+        {
+
+            if (gezogen.Count > 0) return;
+
+            Button b = (Button)sender;
+
+            int n = (int)b.Tag;
+
+            if (auswahl.Contains(n))
+
+            {
+
+                auswahl.Remove(n);
+
+                b.Background = Brushes.LightGray;
+
+            }
+
+            else
+
+            {
+
+                if (auswahl.Count >= 6)
+
+                {
+
+                    MessageBox.Show("Nur 6 Zahlen erlaubt");
+
+                    return;
+
+                }
+
+                auswahl.Add(n);
+
+                b.Background = Brushes.LightGreen;
+
+            }
+
+        }
+
+        void Ziehung_Click(object sender, RoutedEventArgs e)
+
+        {
+
+            if (auswahl.Count != 6)
+
+            {
+
+                MessageBox.Show("Wähle genau 6 Zahlen");
+
+                return;
+
+            }
+
+            if (geld < 5)
+
+            {
+
+                MessageBox.Show("Nicht genug Geld");
+
+                return;
+
+            }
+
+            geld -= 5;
+
+            gezogen.Clear();
+
+            List<int> zahlen = new List<int>();
+
+            for (int i = 1; i <= 49; i++) zahlen.Add(i);
+
+            Random r = new Random();
+
+            while (gezogen.Count < 6)
+
+            {
+
+                int z = r.Next(zahlen.Count);
+
+                gezogen.Add(zahlen[z]);
+
+                zahlen.RemoveAt(z);
+
+            }
+
+            int treffer = 0;
+
+            foreach (Button b in knöpfe)
+
+            {
+
+                int z = (int)b.Tag;
+
+                if (auswahl.Contains(z))
+
+                {
+
+                    if (gezogen.Contains(z))
+
+                    {
+
+                        b.Background = Brushes.LightGreen;
+
+                        treffer++;
+
+                    }
+
+                    else b.Background = Brushes.Red;
+
+                }
+
+                else b.Background = Brushes.LightGray;
+
+            }
+
+            double gewinn = 0;
+
+            if (treffer == 1) gewinn = 1;
+
+            if (treffer == 2) gewinn = 5;
+
+            if (treffer == 3) gewinn = 100;
+
+            if (treffer == 4) gewinn = 1000;
+
+            if (treffer == 5) gewinn = 1500;
+
+            if (treffer == 6) gewinn = 2000;
+
+            geld += gewinn;
+
+            GeldAktualisieren();
+
+            MessageBox.Show("Gezogen: " + string.Join(" ", gezogen) +
+
+                            "\nDeine: " + string.Join(" ", auswahl) +
+
+                            "\nTreffer: " + treffer +
+
+                            "\nGewinn: " + gewinn + " €");
+
+        }
+
+        void Reset_Click(object sender, RoutedEventArgs e)
+
+        {
+
+            auswahl.Clear();
+
+            gezogen.Clear();
+
+            foreach (Button b in knöpfe)
+
+                b.Background = Brushes.LightGray;
+
+            GeldAktualisieren();
+
+        }
+
+        void GeldAktualisieren()
+
+        {
+
+            GeldText.Text = "Geld: " + geld.ToString("0.00") + " €";
+
+        }
+
+    }
+
+}
+