ui(client): migrate to AvaloniaUI

ModpackUpdater.Apps.Client.Gui/App.axaml

@@ -0,0 +1,10 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="ModpackUpdater.Apps.Client.Gui.App"
+             RequestedThemeVariant="Default">
+             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
+
+    <Application.Styles>
+        <FluentTheme />
+    </Application.Styles>
+</Application>

ModpackUpdater.Apps.Client.Gui/App.axaml.cs

@@ -0,0 +1,20 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace ModpackUpdater.Apps.Client.Gui;
+
+public partial class App : Application
+{
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+            desktop.MainWindow = new MainForm();
+        base.OnFrameworkInitializationCompleted();
+    }
+}

ModpackUpdater.Apps.Client.Gui/App.config

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<configuration>
-  <appSettings>
-    <add key="TelerikWinFormsThemeName" value="Windows11CompactDark" />
-  </appSettings>
-</configuration>

ModpackUpdater.Apps.Client.Gui/AppConfig.cs

@@ -7,10 +7,10 @@ public class AppConfig : ISettingsNode, ISettingsIdentifier
 {
     public static string Identifier => "pilz.appconfig";
 
-    public string LastMinecraftProfilePath { get; set; }
+    public string? LastMinecraftProfilePath { get; set; }
 
     [JsonIgnore, Obsolete]
-    public string ConfigFilePath { get; private set; }
+    public string? ConfigFilePath { get; private set; }
     [JsonProperty("ConfigFilePath"), Obsolete]
     private string ConfigFilePathLegacy
     {

ModpackUpdater.Apps.Client.Gui/AppUpdater.cs

@@ -10,12 +10,12 @@ public class AppUpdater(string updateUrl)
     private class UpdateInfo
     {
         [JsonConverter(typeof(VersionConverter))]
-        public Version Version { get; set; }
+        public Version? Version { get; set; }
-        public string DownloadUrl { get; set; }
+        public string? DownloadUrl { get; set; }
     }
 
     private readonly HttpClient httpClient = new();
-    private UpdateInfo info;
+    private UpdateInfo? info;
 
     public async Task<bool> Check()
     {

ModpackUpdater.Apps.Client.Gui/LangRes.Designer.cs

@@ -60,6 +60,15 @@ namespace ModpackUpdater.My.Resources {
             }
         }
         
+        /// <summary>
+        ///   Sucht eine lokalisierte Zeichenfolge, die Select the minecraft profile folder (usually named .minecraft) ähnelt.
+        /// </summary>
+        internal static string FileDialog_SelectMinecraftProfileFolder {
+            get {
+                return ResourceManager.GetString("FileDialog_SelectMinecraftProfileFolder", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Sucht eine lokalisierte Zeichenfolge, die A new version of this program is available. If you confirm, the update will be installed automatically. It takes just a few seconds. Continue? ähnelt.
         /// </summary>

ModpackUpdater.Apps.Client.Gui/LangRes.resx

@@ -117,6 +117,9 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
+  <data name="FileDialog_SelectMinecraftProfileFolder" xml:space="preserve">
+    <value>Select the minecraft profile folder (usually named .minecraft)</value>
+  </data>
   <data name="MsgBox_UpdateAvailable" xml:space="preserve">
     <value>A new version of this program is available. If you confirm, the update will be installed automatically. It takes just a few seconds. Continue?</value>
   </data>

ModpackUpdater.Apps.Client.Gui/MainForm.Designer.cs

@@ -1,288 +0,0 @@
-using System;
-using System.Diagnostics;
-using System.Drawing;
-using System.Windows.Forms;
-
-namespace ModpackUpdater.Apps.Client.Gui
-{
-    [Microsoft.VisualBasic.CompilerServices.DesignerGenerated()]
-
-    public partial class MainForm : Telerik.WinControls.UI.RadForm
-    {
-
-        // Das Formular überschreibt den Löschvorgang, um die Komponentenliste zu bereinigen.
-        [DebuggerNonUserCode()]
-        protected override void Dispose(bool disposing)
-        {
-            try
-            {
-                if (disposing && components is not null)
-                    components.Dispose();
-            }
-            finally
-            {
-                base.Dispose(disposing);
-            }
-        }
-
-        // Wird vom Windows Form-Designer benötigt.
-        private System.ComponentModel.IContainer components = new System.ComponentModel.Container();
-
-        // Hinweis: Die folgende Prozedur ist für den Windows Form-Designer erforderlich.
-        // Das Bearbeiten ist mit dem Windows Form-Designer möglich.  
-        // Das Bearbeiten mit dem Code-Editor ist nicht möglich.
-        [DebuggerStepThrough()]
-        private void InitializeComponent()
-        {
-            var resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));
-            RadLabel_MinecraftProfile = new Telerik.WinControls.UI.RadLabel();
-            RadLabel_ModpackUrl = new Telerik.WinControls.UI.RadLabel();
-            RadTextBox_MinecraftProfileFolder = new Telerik.WinControls.UI.RadTextBoxControl();
-            RadTextBox_ModpackConfig = new Telerik.WinControls.UI.RadTextBoxControl();
-            RadButton_Install = new Telerik.WinControls.UI.RadSplitButton();
-            radMenuItem_Install = new Telerik.WinControls.UI.RadMenuItem();
-            radMenuItem_Repair = new Telerik.WinControls.UI.RadMenuItem();
-            RadButton_CheckForUpdates = new Telerik.WinControls.UI.RadButton();
-            RadButton_SearchMinecraftProfileFolder = new Telerik.WinControls.UI.RadButton();
-            tableLayoutPanel1 = new TableLayoutPanel();
-            RadLabel_Status = new Telerik.WinControls.UI.RadLabel();
-            RadLabel_StatusDesc = new Telerik.WinControls.UI.RadLabel();
-            radLabel_InstallationKey = new Telerik.WinControls.UI.RadLabel();
-            radTextBox_InstallKey = new Telerik.WinControls.UI.RadTextBoxControl();
-            ((System.ComponentModel.ISupportInitialize)RadLabel_MinecraftProfile).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)RadLabel_ModpackUrl).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)RadTextBox_MinecraftProfileFolder).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)RadTextBox_ModpackConfig).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)RadButton_Install).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)RadButton_CheckForUpdates).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)RadButton_SearchMinecraftProfileFolder).BeginInit();
-            tableLayoutPanel1.SuspendLayout();
-            ((System.ComponentModel.ISupportInitialize)RadLabel_Status).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)RadLabel_StatusDesc).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)radLabel_InstallationKey).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)radTextBox_InstallKey).BeginInit();
-            ((System.ComponentModel.ISupportInitialize)this).BeginInit();
-            SuspendLayout();
-            // 
-            // RadLabel_MinecraftProfile
-            // 
-            RadLabel_MinecraftProfile.Anchor = AnchorStyles.Left;
-            RadLabel_MinecraftProfile.Location = new Point(3, 6);
-            RadLabel_MinecraftProfile.Name = "RadLabel_MinecraftProfile";
-            RadLabel_MinecraftProfile.Size = new Size(89, 18);
-            RadLabel_MinecraftProfile.TabIndex = 0;
-            RadLabel_MinecraftProfile.Text = "Minecraft profile";
-            // 
-            // RadLabel_ModpackUrl
-            // 
-            RadLabel_ModpackUrl.Anchor = AnchorStyles.Left;
-            RadLabel_ModpackUrl.Location = new Point(3, 36);
-            RadLabel_ModpackUrl.Name = "RadLabel_ModpackUrl";
-            RadLabel_ModpackUrl.Size = new Size(76, 18);
-            RadLabel_ModpackUrl.TabIndex = 1;
-            RadLabel_ModpackUrl.Text = "Modpack URL";
-            // 
-            // RadTextBox_MinecraftProfileFolder
-            // 
-            RadTextBox_MinecraftProfileFolder.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
-            tableLayoutPanel1.SetColumnSpan(RadTextBox_MinecraftProfileFolder, 3);
-            RadTextBox_MinecraftProfileFolder.Location = new Point(98, 3);
-            RadTextBox_MinecraftProfileFolder.Name = "RadTextBox_MinecraftProfileFolder";
-            RadTextBox_MinecraftProfileFolder.NullText = "C:\\Users\\...\\AppData\\...";
-            RadTextBox_MinecraftProfileFolder.Size = new Size(221, 24);
-            RadTextBox_MinecraftProfileFolder.TabIndex = 1;
-            RadTextBox_MinecraftProfileFolder.TextChanged += RadTextBox_MinecraftFolder_TextInserted;
-            // 
-            // RadTextBox_ModpackConfig
-            // 
-            RadTextBox_ModpackConfig.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
-            tableLayoutPanel1.SetColumnSpan(RadTextBox_ModpackConfig, 5);
-            RadTextBox_ModpackConfig.Location = new Point(98, 33);
-            RadTextBox_ModpackConfig.Name = "RadTextBox_ModpackConfig";
-            RadTextBox_ModpackConfig.NullText = "https://...";
-            RadTextBox_ModpackConfig.Size = new Size(321, 24);
-            RadTextBox_ModpackConfig.TabIndex = 3;
-            RadTextBox_ModpackConfig.TextChanged += RadTextBox_ModpackUrl_TextInserted;
-            // 
-            // RadButton_Install
-            // 
-            RadButton_Install.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
-            tableLayoutPanel1.SetColumnSpan(RadButton_Install, 2);
-            RadButton_Install.ImageAlignment = ContentAlignment.MiddleRight;
-            RadButton_Install.Items.AddRange(new Telerik.WinControls.RadItem[] { radMenuItem_Install, radMenuItem_Repair });
-            RadButton_Install.Location = new Point(325, 121);
-            RadButton_Install.Name = "RadButton_Install";
-            RadButton_Install.Size = new Size(94, 24);
-            RadButton_Install.TabIndex = 0;
-            RadButton_Install.Text = "Install";
-            RadButton_Install.TextAlignment = ContentAlignment.MiddleLeft;
-            RadButton_Install.TextImageRelation = TextImageRelation.ImageBeforeText;
-            // 
-            // radMenuItem_Install
-            // 
-            radMenuItem_Install.Name = "radMenuItem_Install";
-            radMenuItem_Install.Text = "Install";
-            radMenuItem_Install.Click += RadMenuItem_Install_Click;
-            // 
-            // radMenuItem_Repair
-            // 
-            radMenuItem_Repair.Name = "radMenuItem_Repair";
-            radMenuItem_Repair.Text = "Repair";
-            radMenuItem_Repair.Click += RadMenuItem_Repair_Click;
-            // 
-            // RadButton_CheckForUpdates
-            // 
-            RadButton_CheckForUpdates.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
-            tableLayoutPanel1.SetColumnSpan(RadButton_CheckForUpdates, 3);
-            RadButton_CheckForUpdates.ImageAlignment = ContentAlignment.MiddleRight;
-            RadButton_CheckForUpdates.Location = new Point(98, 121);
-            RadButton_CheckForUpdates.Name = "RadButton_CheckForUpdates";
-            RadButton_CheckForUpdates.Size = new Size(221, 24);
-            RadButton_CheckForUpdates.TabIndex = 100;
-            RadButton_CheckForUpdates.Text = "Check for Updates";
-            RadButton_CheckForUpdates.TextAlignment = ContentAlignment.MiddleLeft;
-            RadButton_CheckForUpdates.TextImageRelation = TextImageRelation.ImageBeforeText;
-            RadButton_CheckForUpdates.Click += ButtonX_CheckForUpdates_Click;
-            // 
-            // RadButton_SearchMinecraftProfileFolder
-            // 
-            RadButton_SearchMinecraftProfileFolder.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
-            tableLayoutPanel1.SetColumnSpan(RadButton_SearchMinecraftProfileFolder, 2);
-            RadButton_SearchMinecraftProfileFolder.ImageAlignment = ContentAlignment.MiddleRight;
-            RadButton_SearchMinecraftProfileFolder.Location = new Point(325, 3);
-            RadButton_SearchMinecraftProfileFolder.Name = "RadButton_SearchMinecraftProfileFolder";
-            RadButton_SearchMinecraftProfileFolder.Size = new Size(94, 24);
-            RadButton_SearchMinecraftProfileFolder.TabIndex = 2;
-            RadButton_SearchMinecraftProfileFolder.Text = "Search";
-            RadButton_SearchMinecraftProfileFolder.TextAlignment = ContentAlignment.MiddleLeft;
-            RadButton_SearchMinecraftProfileFolder.TextImageRelation = TextImageRelation.ImageBeforeText;
-            RadButton_SearchMinecraftProfileFolder.Click += ButtonX_SearchMinecraftProfile_Click;
-            // 
-            // tableLayoutPanel1
-            // 
-            tableLayoutPanel1.AutoSize = true;
-            tableLayoutPanel1.AutoSizeMode = AutoSizeMode.GrowAndShrink;
-            tableLayoutPanel1.ColumnCount = 6;
-            tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle());
-            tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.Percent, 100F));
-            tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 50F));
-            tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 50F));
-            tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 50F));
-            tableLayoutPanel1.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, 50F));
-            tableLayoutPanel1.Controls.Add(RadLabel_MinecraftProfile, 0, 0);
-            tableLayoutPanel1.Controls.Add(RadLabel_ModpackUrl, 0, 1);
-            tableLayoutPanel1.Controls.Add(RadTextBox_MinecraftProfileFolder, 1, 0);
-            tableLayoutPanel1.Controls.Add(RadTextBox_ModpackConfig, 1, 1);
-            tableLayoutPanel1.Controls.Add(RadLabel_Status, 1, 3);
-            tableLayoutPanel1.Controls.Add(RadLabel_StatusDesc, 0, 3);
-            tableLayoutPanel1.Controls.Add(RadButton_Install, 4, 4);
-            tableLayoutPanel1.Controls.Add(radLabel_InstallationKey, 0, 2);
-            tableLayoutPanel1.Controls.Add(radTextBox_InstallKey, 1, 2);
-            tableLayoutPanel1.Controls.Add(RadButton_CheckForUpdates, 1, 4);
-            tableLayoutPanel1.Controls.Add(RadButton_SearchMinecraftProfileFolder, 4, 0);
-            tableLayoutPanel1.Dock = DockStyle.Fill;
-            tableLayoutPanel1.Location = new Point(0, 0);
-            tableLayoutPanel1.Name = "tableLayoutPanel1";
-            tableLayoutPanel1.RowCount = 5;
-            tableLayoutPanel1.RowStyles.Add(new RowStyle());
-            tableLayoutPanel1.RowStyles.Add(new RowStyle());
-            tableLayoutPanel1.RowStyles.Add(new RowStyle());
-            tableLayoutPanel1.RowStyles.Add(new RowStyle());
-            tableLayoutPanel1.RowStyles.Add(new RowStyle());
-            tableLayoutPanel1.Size = new Size(422, 151);
-            tableLayoutPanel1.TabIndex = 7;
-            // 
-            // RadLabel_Status
-            // 
-            RadLabel_Status.Anchor = AnchorStyles.Left;
-            tableLayoutPanel1.SetColumnSpan(RadLabel_Status, 5);
-            RadLabel_Status.Location = new Point(98, 95);
-            RadLabel_Status.Name = "RadLabel_Status";
-            RadLabel_Status.Size = new Size(11, 18);
-            RadLabel_Status.TabIndex = 3;
-            RadLabel_Status.Text = "-";
-            RadLabel_Status.TextImageRelation = TextImageRelation.ImageBeforeText;
-            // 
-            // RadLabel_StatusDesc
-            // 
-            RadLabel_StatusDesc.Anchor = AnchorStyles.Left;
-            RadLabel_StatusDesc.Location = new Point(3, 93);
-            RadLabel_StatusDesc.Name = "RadLabel_StatusDesc";
-            RadLabel_StatusDesc.Size = new Size(46, 22);
-            RadLabel_StatusDesc.TabIndex = 2;
-            RadLabel_StatusDesc.Text = "Status";
-            // 
-            // radLabel_InstallationKey
-            // 
-            radLabel_InstallationKey.Anchor = AnchorStyles.Left;
-            radLabel_InstallationKey.Location = new Point(3, 66);
-            radLabel_InstallationKey.Name = "radLabel_InstallationKey";
-            radLabel_InstallationKey.Size = new Size(81, 18);
-            radLabel_InstallationKey.TabIndex = 12;
-            radLabel_InstallationKey.Text = "Installation key";
-            radLabel_InstallationKey.Visible = false;
-            // 
-            // radTextBox_InstallKey
-            // 
-            radTextBox_InstallKey.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
-            tableLayoutPanel1.SetColumnSpan(radTextBox_InstallKey, 5);
-            radTextBox_InstallKey.Location = new Point(98, 63);
-            radTextBox_InstallKey.Name = "radTextBox_InstallKey";
-            radTextBox_InstallKey.NullText = "AAAAA-BBBBB-CCCCC-DDDDD-EEEEE";
-            radTextBox_InstallKey.Size = new Size(321, 24);
-            radTextBox_InstallKey.TabIndex = 4;
-            radTextBox_InstallKey.Visible = false;
-            radTextBox_InstallKey.TextChanged += RadTextBox_InstallationKey_TextInserted;
-            // 
-            // MainForm
-            // 
-            AutoScaleBaseSize = new Size(7, 15);
-            AutoScaleDimensions = new SizeF(7F, 15F);
-            AutoScaleMode = AutoScaleMode.Font;
-            AutoSize = true;
-            AutoSizeMode = AutoSizeMode.GrowAndShrink;
-            ClientSize = new Size(422, 151);
-            Controls.Add(tableLayoutPanel1);
-            Icon = (Icon)resources.GetObject("$this.Icon");
-            MaximizeBox = false;
-            MinimumSize = new Size(430, 0);
-            Name = "MainForm";
-            StartPosition = FormStartPosition.CenterScreen;
-            Text = "Minecraft Modpack Updater";
-            FormClosing += Form1_FormClosing;
-            Load += Form1_Load;
-            Shown += Form1_Shown;
-            ((System.ComponentModel.ISupportInitialize)RadLabel_MinecraftProfile).EndInit();
-            ((System.ComponentModel.ISupportInitialize)RadLabel_ModpackUrl).EndInit();
-            ((System.ComponentModel.ISupportInitialize)RadTextBox_MinecraftProfileFolder).EndInit();
-            ((System.ComponentModel.ISupportInitialize)RadTextBox_ModpackConfig).EndInit();
-            ((System.ComponentModel.ISupportInitialize)RadButton_Install).EndInit();
-            ((System.ComponentModel.ISupportInitialize)RadButton_CheckForUpdates).EndInit();
-            ((System.ComponentModel.ISupportInitialize)RadButton_SearchMinecraftProfileFolder).EndInit();
-            tableLayoutPanel1.ResumeLayout(false);
-            tableLayoutPanel1.PerformLayout();
-            ((System.ComponentModel.ISupportInitialize)RadLabel_Status).EndInit();
-            ((System.ComponentModel.ISupportInitialize)RadLabel_StatusDesc).EndInit();
-            ((System.ComponentModel.ISupportInitialize)radLabel_InstallationKey).EndInit();
-            ((System.ComponentModel.ISupportInitialize)radTextBox_InstallKey).EndInit();
-            ((System.ComponentModel.ISupportInitialize)this).EndInit();
-            ResumeLayout(false);
-            PerformLayout();
-        }
-
-        internal Telerik.WinControls.UI.RadLabel RadLabel_MinecraftProfile;
-        internal Telerik.WinControls.UI.RadLabel RadLabel_ModpackUrl;
-        internal Telerik.WinControls.UI.RadTextBoxControl RadTextBox_MinecraftProfileFolder;
-        internal Telerik.WinControls.UI.RadTextBoxControl RadTextBox_ModpackConfig;
-        internal Telerik.WinControls.UI.RadSplitButton RadButton_Install;
-        internal Telerik.WinControls.UI.RadButton RadButton_CheckForUpdates;
-        internal Telerik.WinControls.UI.RadButton RadButton_SearchMinecraftProfileFolder;
-        private TableLayoutPanel tableLayoutPanel1;
-        internal Telerik.WinControls.UI.RadLabel radLabel_InstallationKey;
-        internal Telerik.WinControls.UI.RadTextBoxControl radTextBox_InstallKey;
-        private Telerik.WinControls.UI.RadMenuItem radMenuItem_Repair;
-        private Telerik.WinControls.UI.RadMenuItem radMenuItem_Install;
-        internal Telerik.WinControls.UI.RadLabel RadLabel_Status;
-        internal Telerik.WinControls.UI.RadLabel RadLabel_StatusDesc;
-    }
-}

ModpackUpdater.Apps.Client.Gui/MainForm.axaml

@@ -0,0 +1,126 @@
+<Window xmlns="https://github.com/avaloniaui"
+    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:svg="clr-namespace:Avalonia.Svg;assembly=Avalonia.Svg"
+    mc:Ignorable="d"
+    x:Class="ModpackUpdater.Apps.Client.Gui.MainForm"
+    SizeToContent="WidthAndHeight"
+    Title="Minecraft Modpack Updater"
+    Icon="/Assets/app.ico"
+    >
+    
+    <Grid
+        RowDefinitions="Auto,Auto,Auto,Auto,Auto"
+        Margin="3, 3, 3, 3"
+        RowSpacing="6"
+        ColumnSpacing="6"
+        HorizontalAlignment="Stretch"
+        VerticalAlignment="Top"
+        >
+        
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="*"/>
+            <ColumnDefinition Width="*" MinWidth="300"/>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+        
+        <!-- Labels -->
+        <Label Grid.Row="0" Grid.Column="0" VerticalAlignment="Center" Content="Minecraft profile:" />
+        <Label Grid.Row="1" Grid.Column="0" VerticalAlignment="Center" Content="Modpack config url:" />
+        <Label Grid.Row="2" Grid.Column="0" VerticalAlignment="Center" IsVisible="false" x:Name="LabelInstallKey" Content="Installation key:" />
+        <Label Grid.Row="3" Grid.Column="0" VerticalAlignment="Center" Content="Status:" />
+        <Label Grid.Row="3" Grid.Column="1" VerticalAlignment="Center">
+            <StackPanel Orientation="Horizontal">
+                <Image Width="16" Height="16" x:Name="ImageStatus" />
+                <TextBlock Margin="3, 0, 0, 0" x:Name="TextStatus" />
+            </StackPanel>
+        </Label>
+        
+        <!-- TextBoxes: Profile -->
+        <TextBox
+            x:Name="TextBoxMinecraftProfileFolder"
+            Grid.Row="0"
+            Grid.Column="1"
+            VerticalAlignment="Center"
+            Watermark="C:\..."
+            TextInput="TextBoxMinecraftProfileFolder_TextInserted"
+            />
+        
+        <!-- TextBoxes: ModpackConfig -->
+        <TextBox
+            x:Name="TextBoxModpackConfig"
+            Grid.Row="1"
+            Grid.Column="1"
+            Grid.ColumnSpan="2"
+            VerticalAlignment="Center"
+            Watermark="https://..."
+            TextInput="TextBoxModpackConfig_TextInserted"
+            />
+      
+        <!-- TextBoxes: InstallKey -->
+        <TextBox
+            x:Name="TextBoxInstallKey"
+            Grid.Row="2"
+            Grid.Column="1"
+            Grid.ColumnSpan="2"
+            VerticalAlignment="Center"
+            Watermark="XXXXX-YYYYY-ZZZZZ-AAAAA-BBBBB"
+            TextInput="TextBoxInstallKey_TextInserted"
+            IsVisible="false"
+            />
+        
+        <!-- Button: SearchProfileFolder -->
+        <Button
+            Grid.Row="0"
+            Grid.Column="2"
+            VerticalAlignment="Stretch"
+            HorizontalAlignment="Stretch"
+            HorizontalContentAlignment="Center"
+            Click="ButtonSearchProfileFolder_Click"
+            >
+            <StackPanel Orientation="Horizontal">
+                <Image VerticalAlignment="Center" Width="16" Height="16" x:Name="ButtonImageSearchProfileFolder" />
+                <TextBlock VerticalAlignment="Center" Margin="3, 0, 0, 0">Search</TextBlock>
+            </StackPanel>
+        </Button>
+        
+        <!-- Button: CheckForUpdates -->
+        <Button
+            Grid.Row="4"
+            Grid.Column="1"
+            VerticalAlignment="Stretch"
+            HorizontalAlignment="Stretch" HorizontalContentAlignment="Center" x:Name="ButtonCheckForUpdates" Click="ButtonCheckForUpdates_Click"
+            >
+            <StackPanel Orientation="Horizontal">
+                <Image VerticalAlignment="Center" Width="16" Height="16" x:Name="ButtonImageCheckForUpdates" />
+                <TextBlock VerticalAlignment="Center" Margin="3, 0, 0, 0">Check for updates</TextBlock>
+            </StackPanel>
+        </Button>
+        
+        <!-- Button: Install -->
+        <SplitButton
+            Grid.Row="4"
+            Grid.Column="2"
+            VerticalAlignment="Stretch"
+            HorizontalAlignment="Stretch"
+            HorizontalContentAlignment="Center"
+            x:Name="ButtonInstall"
+            Click="ButtonInstall_Click"
+            >
+            <StackPanel Orientation="Horizontal">
+                <Image VerticalAlignment="Center" Width="16" Height="16" x:Name="ButtonImageInstall" />
+                <TextBlock VerticalAlignment="Center" Margin="3, 0, 0, 0">Install</TextBlock>
+            </StackPanel>
+            <SplitButton.Flyout>
+                <MenuFlyout>
+                    <MenuItem Header="Repair" Click="MenuItemRepair_Click">
+                        <MenuItem.Icon>
+                            <Image Width="16" Height="16" x:Name="MenuItemImageRepair" />
+                        </MenuItem.Icon>
+                    </MenuItem>
+                </MenuFlyout>
+            </SplitButton.Flyout>
+        </SplitButton>
+    </Grid>
+</Window>

ModpackUpdater.Apps.Client.Gui/MainForm.axaml.cs

@@ -1,22 +1,26 @@
-using ModpackUpdater.Manager;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Media;
+using Avalonia.Platform.Storage;
+using ModpackUpdater.Manager;
 using ModpackUpdater.My.Resources;
+using MsBox.Avalonia;
+using MsBox.Avalonia.Enums;
 using Pilz.Extensions;
-using Pilz.UI.Symbols;
+using Pilz.SymbolPacks.Sets;
-using Pilz.UI.WinForms.Extensions;
+using Pilz.UI.AvaloniaUI.Symbols;
 using System.Diagnostics;
 using System.Reflection;
-using Telerik.WinControls;
-using Telerik.WinControls.UI;
 
 namespace ModpackUpdater.Apps.Client.Gui;
 
-public partial class MainForm
+public partial class MainForm : Window
 {
     private readonly UpdateCheckOptions updateOptions = new();
     private ModpackInfo modpackInfo = new();
     private ModpackConfig updateConfig = new();
-    private ModpackFeatures features;
+    private ModpackFeatures? features;
-    private UpdateCheckResult lastUpdateCheckResult;
+    private UpdateCheckResult? lastUpdateCheckResult;
     private bool currentUpdating;
     private bool loadingData;
     private int curOptionsRow = 3;
@@ -25,42 +29,42 @@ public partial class MainForm
     {
         InitializeComponent();
 
-        Text = $"{Text} (v{Assembly.GetExecutingAssembly().GetAppVersion()})";
+        Title = $"{Title} (v{Assembly.GetExecutingAssembly().GetAppVersion()})";
-        RadButton_Install.DefaultItem = radMenuItem_Install;
 
-        RadButton_CheckForUpdates.SvgImage = AppGlobals.Symbols.GetSvgImage(AppSymbols.update_done, SymbolSize.Small);
+        Closing += MainForm_Closing;
-        RadButton_SearchMinecraftProfileFolder.SvgImage = AppGlobals.Symbols.GetSvgImage(AppSymbols.opened_folder, SymbolSize.Small);
+        Loaded += MainForm_Loaded;
-        RadButton_Install.SvgImage = AppGlobals.Symbols.GetSvgImage(AppSymbols.software_installer, SymbolSize.Small);
-        radMenuItem_Install.SvgImage = AppGlobals.Symbols.GetSvgImage(AppSymbols.software_installer, SymbolSize.Small);
-        radMenuItem_Repair.SvgImage = AppGlobals.Symbols.GetSvgImage(AppSymbols.wrench, SymbolSize.Small);
 
+        ButtonImageSearchProfileFolder.Source = Symbols.Fluent.GetImageSource(SymbolsFluent.opened_folder);
+        ButtonImageCheckForUpdates.Source = Symbols.Fluent.GetImageSource(SymbolsFluent.update);
+        ButtonImageInstall.Source = Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer);
+        MenuItemImageRepair.Source = Symbols.Fluent.GetImageSource(SymbolsFluent.wrench);
+
+        ClearStatus();
         LoadProfileToUi();
     }
 
     #region Features
 
-    private void SetStatus(string statusText, RadSvgImage image)
+    private void SetStatus(string statusText, IImage? image)
     {
-        RadLabel_Status.Text = statusText;
+        TextStatus.Text = statusText;
-        RadLabel_Status.SvgImage = image;
+        ImageStatus.Source = image;
     }
 
     private void ClearStatus()
     {
-        RadLabel_Status.Text = "-";
+        TextStatus.Text = "-";
-        RadLabel_Status.SvgImage = null;
+        ImageStatus.Source = null;
     }
 
     private void LoadProfileToUi()
     {
         loadingData = true;
-        tableLayoutPanel1.SuspendLayout();
 
-        RadTextBox_MinecraftProfileFolder.Text = modpackInfo?.LocaLPath ?? AppConfig.Instance.LastMinecraftProfilePath ?? RadTextBox_MinecraftProfileFolder.Text;
+        TextBoxMinecraftProfileFolder.Text = modpackInfo?.LocaLPath ?? AppConfig.Instance.LastMinecraftProfilePath ?? TextBoxMinecraftProfileFolder.Text;
-        RadTextBox_ModpackConfig.Text = modpackInfo?.ConfigUrl ?? RadTextBox_ModpackConfig.Text;
+        TextBoxModpackConfig.Text = modpackInfo?.ConfigUrl ?? TextBoxModpackConfig.Text;
-        radTextBox_InstallKey.Text = modpackInfo?.ExtrasKey ?? radTextBox_InstallKey.Text;
+        TextBoxInstallKey.Text = modpackInfo?.ExtrasKey ?? TextBoxInstallKey.Text;
 
-        tableLayoutPanel1.ResumeLayout();
         loadingData = false;
     }
 
@@ -82,7 +86,7 @@ public partial class MainForm
     {
         try
         {
-            modpackInfo = ModpackInfo.TryLoad(RadTextBox_MinecraftProfileFolder.Text.Trim());
+            modpackInfo = ModpackInfo.TryLoad(TextBoxMinecraftProfileFolder.Text?.Trim());
         }
         catch
         {
@@ -93,7 +97,7 @@ public partial class MainForm
 
         try
         {
-            updateConfig = ModpackConfig.LoadFromUrl(RadTextBox_ModpackConfig.Text);
+            updateConfig = ModpackConfig.LoadFromUrl(TextBoxModpackConfig.Text);
         }
         catch (Exception)
         {
@@ -102,39 +106,39 @@ public partial class MainForm
         if (modpackInfo != null)
             features = new(updateConfig);
 
-        radTextBox_InstallKey.Visible = radLabel_InstallationKey.Visible = !string.IsNullOrWhiteSpace(updateConfig.UnleashApiUrl);
+        LabelInstallKey.IsVisible = TextBoxInstallKey.IsVisible = !string.IsNullOrWhiteSpace(updateConfig.UnleashApiUrl);
 
-        if (modpackInfo == null || string.IsNullOrWhiteSpace(RadTextBox_MinecraftProfileFolder.Text) /*|| modpackInfo.Valid*/)
+        if (modpackInfo == null || string.IsNullOrWhiteSpace(TextBoxMinecraftProfileFolder.Text) /*|| modpackInfo.Valid*/)
         {
-            SetStatus(LangRes.StatusText_MinecraftProfileWarning, AppGlobals.Symbols.GetSvgImage(AppSymbols.general_warning_sign, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_MinecraftProfileWarning, Symbols.Fluent.GetImageSource(SymbolsFluent.warning_shield));
-            RadButton_CheckForUpdates.Enabled = false;
+            ButtonCheckForUpdates.IsEnabled = false;
-            RadButton_Install.Enabled = false;
+            ButtonInstall.IsEnabled = false;
             return false;
         }
-        else if (updateConfig == null || string.IsNullOrWhiteSpace(RadTextBox_ModpackConfig.Text))
+        else if (updateConfig == null || string.IsNullOrWhiteSpace(TextBoxModpackConfig.Text))
         {
-            SetStatus(LangRes.StatusText_ConfigIncompleteOrNotLoaded, AppGlobals.Symbols.GetSvgImage(AppSymbols.general_warning_sign, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_ConfigIncompleteOrNotLoaded, Symbols.Fluent.GetImageSource(SymbolsFluent.warning_shield));
-            RadButton_CheckForUpdates.Enabled = false;
+            ButtonCheckForUpdates.IsEnabled = false;
-            RadButton_Install.Enabled = false;
+            ButtonInstall.IsEnabled = false;
             return false;
         }
         else if (updateConfig.Maintenance && !updateOptions.IgnoreMaintenance)
         {
-            SetStatus(LangRes.StatusText_Maintenance, AppGlobals.Symbols.GetSvgImage(AppSymbols.services, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_Maintenance, Symbols.Fluent.GetImageSource(SymbolsFluent.services));
-            RadButton_CheckForUpdates.Enabled = false;
+            ButtonCheckForUpdates.IsEnabled = false;
-            RadButton_Install.Enabled = false;
+            ButtonInstall.IsEnabled = false;
             return false;
         }
         LoadOptionsToUi();
-        RadButton_CheckForUpdates.Enabled = true;
+        ButtonCheckForUpdates.IsEnabled = true;
-        RadButton_Install.Enabled = true;
+        ButtonInstall.IsEnabled = true;
         return true;
     }
 
     private async Task ExecuteUpdate(bool doInstall, bool repair)
     {
         // Ensure set extras key
-        modpackInfo.ExtrasKey = radTextBox_InstallKey.Text.Trim();
+        modpackInfo.ExtrasKey = TextBoxInstallKey.Text?.Trim();
 
         var updater = new ModpackInstaller(updateConfig, modpackInfo);
         updater.InstallProgessUpdated += Update_InstallProgessUpdated;
@@ -142,31 +146,31 @@ public partial class MainForm
 
         void error()
         {
-            SetStatus(LangRes.StatusText_ErrorWhileUpdateCheckOrUpdate, AppGlobals.Symbols.GetSvgImage(AppSymbols.close, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_ErrorWhileUpdateCheckOrUpdate, Symbols.Fluent.GetImageSource(SymbolsFluent.close));
             currentUpdating = false;
         }
         void installing()
         {
-            SetStatus(LangRes.StatusText_Installing, AppGlobals.Symbols.GetSvgImage(AppSymbols.software_installer, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_Installing, Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
             currentUpdating = true;
         }
         void updatesAvailable()
         {
-            SetStatus(LangRes.StatusText_UpdateAvailable, AppGlobals.Symbols.GetSvgImage(AppSymbols.software_installer, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_UpdateAvailable, Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
         }
         void everythingOk()
         {
-            SetStatus(LangRes.StatusTest_EverythingOk, AppGlobals.Symbols.GetSvgImage(AppSymbols.done, SymbolSize.Small));
+            SetStatus(LangRes.StatusTest_EverythingOk, Symbols.Fluent.GetImageSource(SymbolsFluent.done));
             currentUpdating = false;
         }
 
         // Check only if not pressed "install", not really needed otherwise.
         if (lastUpdateCheckResult is null || !doInstall || repair)
         {
-            SetStatus(LangRes.StatusText_CheckingForUpdates, AppGlobals.Symbols.GetSvgImage(AppSymbols.update_done, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_CheckingForUpdates, Symbols.Fluent.GetImageSource(SymbolsFluent.update));
 
             // Check for extras once again
-            updateOptions.IncludeExtras = features.IsEnabled(ModpackFeatures.FeatureAllowExtas, new AllowExtrasFeatureContext(modpackInfo));
+            updateOptions.IncludeExtras = features != null && features.IsEnabled(ModpackFeatures.FeatureAllowExtas, new AllowExtrasFeatureContext(modpackInfo));
 
             // Force re-install on repair
             updateOptions.IgnoreInstalledVersion = repair;
@@ -238,75 +242,77 @@ public partial class MainForm
 
     private void Updated_CheckingProgresssUpdated(int toCheck, int processed)
     {
-        SetStatus(Math.Round(processed / (double)toCheck * 100d, 1) + "%", AppGlobals.Symbols.GetSvgImage(AppSymbols.update_done, SymbolSize.Small));
+        SetStatus(Math.Round(processed / (double)toCheck * 100d, 1) + "%", Symbols.Fluent.GetImageSource(SymbolsFluent.update));
     }
 
     private void Update_InstallProgessUpdated(UpdateCheckResult result, int processedSyncs)
     {
         int actionCount = result.Actions.Count;
-        SetStatus(Math.Round(processedSyncs / (double)actionCount * 100d, 1) + "%", AppGlobals.Symbols.GetSvgImage(AppSymbols.software_installer, SymbolSize.Small));
+        SetStatus(Math.Round(processedSyncs / (double)actionCount * 100d, 1) + "%", Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
     }
 
     #endregion
 
     #region Gui
 
-    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
+    private void MainForm_Closing(object? sender, WindowClosingEventArgs e)
     {
-        AppConfig.Instance.LastMinecraftProfilePath = RadTextBox_MinecraftProfileFolder.Text.Trim();
+        AppConfig.Instance.LastMinecraftProfilePath = TextBoxMinecraftProfileFolder.Text?.Trim();
     }
 
-    private void Form1_Load(object sender, EventArgs e)
+    private async void MainForm_Loaded(object? sender, RoutedEventArgs e)
-    {
-    }
-
-    private async void Form1_Shown(object sender, EventArgs e)
     {
         var updater = new AppUpdater(Program.UPDATE_URL);
-        if (await updater.Check() && RadMessageBox.Show(LangRes.MsgBox_UpdateAvailable, LangRes.MsgBox_UpdateAvailable_Title, MessageBoxButtons.YesNo, RadMessageIcon.Info).IsYes())
+        if (await updater.Check() && await MessageBoxManager.GetMessageBoxStandard(LangRes.MsgBox_UpdateAvailable_Title, LangRes.MsgBox_UpdateAvailable, ButtonEnum.YesNo).ShowWindowDialogAsync(this) == ButtonResult.Ok)
         {
-            SetStatus(LangRes.StatusText_InstallingAppUpdate, AppGlobals.Symbols.GetSvgImage(AppSymbols.software_installer, SymbolSize.Small));
+            SetStatus(LangRes.StatusText_InstallingAppUpdate, Symbols.Fluent.GetImageSource(SymbolsFluent.software_installer));
-            Enabled = false;
+            IsEnabled = false;
             await updater.Install();
-            Application.Restart();
+            //Application.Restart(); // FIXME
             return;
         }
 
         CheckStatusAndUpdate(true);
     }
 
-    private void RadTextBox_MinecraftFolder_TextInserted(object o, EventArgs args)
+    private void TextBoxMinecraftProfileFolder_TextInserted(object? o, Avalonia.Input.TextInputEventArgs args)
     {
         if (!loadingData)
             CheckStatusAndUpdate(true);
     }
 
-    private void RadTextBox_ModpackUrl_TextInserted(object o, EventArgs args)
+    private void TextBoxModpackConfig_TextInserted(object? o, Avalonia.Input.TextInputEventArgs args)
     {
         if (!loadingData)
             CheckStatusAndUpdate(false);
     }
 
-    private void RadTextBox_InstallationKey_TextInserted(object o, EventArgs args)
+    private void TextBoxInstallKey_TextInserted(object? o, Avalonia.Input.TextInputEventArgs args)
     {
         if (!loadingData)
             CheckStatusAndUpdate(false);
     }
 
-    private void ButtonX_SearchMinecraftProfile_Click(object sender, EventArgs e)
+    private async void ButtonSearchProfileFolder_Click(object? sender, RoutedEventArgs e)
     {
-        var ofd = new RadOpenFolderDialog();
+        var filePaths = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions
-        if (ofd.ShowDialog(this) == DialogResult.OK)
+        {
-            RadTextBox_MinecraftProfileFolder.Text = ofd.FileName;
+            Title = LangRes.FileDialog_SelectMinecraftProfileFolder,
+            SuggestedStartLocation = await StorageProvider.TryGetFolderFromPathAsync(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)),
+            AllowMultiple = false,
+        });
+
+        if (filePaths.Count >= 1)
+            TextBoxMinecraftProfileFolder.Text = filePaths[0].Path.ToString();
     }
 
-    private async void ButtonX_CheckForUpdates_Click(object sender, EventArgs e)
+    private async void ButtonCheckForUpdates_Click(object? sender, RoutedEventArgs e)
     {
         ClearStatus();
         await ExecuteUpdate(false, false);
     }
 
-    private async void RadMenuItem_Install_Click(object sender, EventArgs e)
+    private async void ButtonInstall_Click(object? sender, RoutedEventArgs e)
     {
         if (!currentUpdating)
         {
@@ -315,7 +321,7 @@ public partial class MainForm
         }
     }
 
-    private async void RadMenuItem_Repair_Click(object sender, EventArgs e)
+    private async void MenuItemRepair_Click(object? sender, RoutedEventArgs e)
     {
         if (!currentUpdating)
         {

ModpackUpdater.Apps.Client.Gui/ModpackUpdater.Apps.Client.Gui.csproj

@@ -2,18 +2,24 @@
   
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net8.0-windows</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
-    <ApplicationIcon>minecraft modpack updater.ico</ApplicationIcon>
+    <ApplicationIcon>Assets/app.ico</ApplicationIcon>
     <AssemblyName>Minecraft Modpack Updater</AssemblyName>
     <ImplicitUsings>true</ImplicitUsings>
-    <UseWindowsForms>true</UseWindowsForms>
+    <Nullable>enable</Nullable>
     <IncludeAllContentForSelfExtract>true</IncludeAllContentForSelfExtract>
+    <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
   </PropertyGroup>
 
   <ItemGroup>
     <Compile Include="..\Version.cs" />
   </ItemGroup>
 
+  <ItemGroup>
+    <AvaloniaResource Include="Assets\**" />
+  </ItemGroup>
+
   <ItemGroup>
     <Compile Update="FiledialogFilters.Designer.cs">
       <DesignTime>True</DesignTime>
@@ -41,24 +47,35 @@
   </ItemGroup>
   
   <ItemGroup>
+    <PackageReference Include="MessageBox.Avalonia" Version="3.3.0" />
     <PackageReference Include="Mono.Options" Version="6.12.0.148" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Pilz.Configuration" Version="3.2.6" />
     <PackageReference Include="Pilz.Cryptography" Version="2.1.2" />
     <PackageReference Include="Pilz.IO" Version="2.1.0" />
-    <PackageReference Include="Pilz.UI" Version="3.0.0" />
+    <PackageReference Include="Pilz.SymbolPacks.Fluent" Version="1.0.12" />
-    <PackageReference Include="Pilz.UI.WinForms" Version="2.6.2" />
+    <PackageReference Include="Pilz.UI.AvaloniaUI" Version="1.0.0" />
-    <PackageReference Include="Pilz.UI.WinForms.Telerik" Version="2.13.3" />
+    <PackageReference Include="Pilz.UI.AvaloniaUI.Symbols" Version="1.0.0" />
-    <PackageReference Include="Pilz.UI.WinForms.Telerik.Symbols" Version="1.2.1" />
+    <PackageReference Include="Avalonia" Version="11.3.8" />
-    <PackageReference Include="UI.for.WinForms.Common" Version="2025.2.612-preview" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.3.8" />
-    <PackageReference Include="UI.for.WinForms.Themes" Version="2025.2.612-preview" />
+    <PackageReference Include="Avalonia.Svg" Version="11.3.0" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.8" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.8" />
+    <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.3.8">
+        <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
+        <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
+    </PackageReference>
   </ItemGroup>
   
   <ItemGroup>
     <ProjectReference Include="..\ModpackUpdater.Apps.AppUpdates\ModpackUpdater.Apps.AppUpdates.csproj" />
-    <ProjectReference Include="..\ModpackUpdater.Apps\ModpackUpdater.Apps.csproj" />
     <ProjectReference Include="..\ModpackUpdater.Manager\ModpackUpdater.Manager.csproj" />
     <ProjectReference Include="..\ModpackUpdater\ModpackUpdater.csproj" />
   </ItemGroup>
   
+  <ItemGroup>
+    <Folder Include="Assets\" />
+  </ItemGroup>
+  
 </Project>

ModpackUpdater.Apps.Client.Gui/Program.cs

@@ -1,4 +1,5 @@
-using Castle.Core.Logging;
+using Avalonia;
+using Castle.Core.Logging;
 using Newtonsoft.Json;
 using Pilz.Configuration;
 
@@ -23,9 +24,15 @@ public static class Program
     [STAThread]
     internal static void Main(string[] args)
     {
-        ApplicationConfiguration.Initialize();
+        BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
-        AppGlobals.Initialize();
+    }
-        Application.Run(new MainForm());
+
+    public static AppBuilder BuildAvaloniaApp()
+    {
+        return AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+            .WithInterFont()
+            .LogToTrace();
     }
 
     private static string GetSettingsPath(int? settingsVersion = 3)