Add project files.

ViewModels/Pages/DataViewModel.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+using System.Windows.Media;
+using DownloadManager.Models;
+using Wpf.Ui.Controls;
+
+namespace DownloadManager.ViewModels.Pages;
+public partial class DataViewModel : ObservableObject, INavigationAware
+{
+    private bool _isInitialized = false;
+
+    [ObservableProperty]
+    private IEnumerable<DataColor> _colors;
+
+    public void OnNavigatedTo()
+    {
+        if (!_isInitialized)
+            InitializeViewModel();
+    }
+
+    public void OnNavigatedFrom()
+    {
+    }
+
+    private void InitializeViewModel()
+    {
+        var random = new Random();
+        var colorCollection = new List<DataColor>();
+
+        for (int i = 0; i < 8192; i++)
+            colorCollection.Add(
+                new DataColor
+                {
+                    Color = new SolidColorBrush(
+                        Color.FromArgb(
+                            (byte)200,
+                            (byte)random.Next(0, 250),
+                            (byte)random.Next(0, 250),
+                            (byte)random.Next(0, 250)
+                        )
+                    )
+                }
+            );
+
+        Colors = colorCollection;
+
+        _isInitialized = true;
+    }
+}