Vizual_Zurnal/Zurnal_Vizual/App.axaml.cs

using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Data.Core.Plugins;
using Avalonia.Markup.Xaml;
using Microsoft.Extensions.DependencyInjection;
using Presence.Desktop.DI;
using Presence.Desktop.ViewModels;
using System.Linq;

namespace Zurnal_Vizual
{
    public partial class App : Application
    {
        public override void Initialize()
        {
            AvaloniaXamlLoader.Load(this);
        }
        public override void OnFrameworkInitializationCompleted()
        {
            var servisCollect = new ServiceCollection();
            servisCollect.AddCommonService();
            var sesrvis = servisCollect.BuildServiceProvider();
            var mainViewModel = sesrvis.GetRequiredService<MainWindowViewModel>();
            if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
            {
                DisableAvaloniaDataAnnotationValidation();

                desktop.MainWindow = new MainWindow
                {
                    DataContext = mainViewModel,
                };
            }

            base.OnFrameworkInitializationCompleted();
        }

        private void DisableAvaloniaDataAnnotationValidation()
        {
            // Get an array of plugins to remove
            var dataValidationPluginsToRemove =
                BindingPlugins.DataValidators.OfType<DataAnnotationsValidationPlugin>().ToArray();

            // remove each entry found
            foreach (var plugin in dataValidationPluginsToRemove)
            {
                BindingPlugins.DataValidators.Remove(plugin);
            }
        }
    }
}