first edit

XLIMS.CORE/Windows/EditWindow.xaml

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+<Window
+    x:Class="XLIMS.CORE.Windows.EditWindow"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    Title="{Binding Title}"
+    DataContext="{Binding}"
+    ShowInTaskbar="True"
+    SizeToContent="WidthAndHeight"
+    ResizeMode="NoResize"
+    WindowStartupLocation="CenterScreen"
+    WindowStyle="ToolWindow">
+    <Window.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="../Resources/CoreDictionary.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Window.Resources>
+    <DockPanel LastChildFill="True">
+        <DockPanel
+            Margin="10"
+            DockPanel.Dock="Bottom"
+            LastChildFill="False">
+            <Button
+                Width="85"
+                Click="Button_Click_1"
+                Command="{Binding CancelCommand}"
+                Content="Отмена"
+                DockPanel.Dock="Right"
+                IsCancel="True" />
+            <Button
+                Width="85"
+                Margin="0,0,10,0"
+                Click="Button_Click_2"
+                Command="{Binding SaveCommand}"
+                Content="ОК"
+                DockPanel.Dock="Right"
+                IsDefault="True" />
+        </DockPanel>
+        <ContentControl Content="{Binding}" />
+    </DockPanel>
+</Window>

XLIMS.CORE/Windows/EditWindow.xaml.cs

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+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.Shapes;
+
+namespace XLIMS.CORE.Windows
+{
+    /// <summary>
+    /// Логика взаимодействия для EditWindow.xaml
+    /// </summary>
+    public partial class EditWindow : Window
+    {
+        public EditWindow()
+        {
+            InitializeComponent();
+        }
+
+        private void Button_Click_1(object sender, RoutedEventArgs e)
+        {
+            DialogResult = false;
+        }
+
+        private void Button_Click_2(object sender, RoutedEventArgs e)
+        {
+            DialogResult = true;
+        }
+    }
+}

XLIMS.CORE/Windows/MainWindow.xaml

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+<Window x:Class="XLIMS.CORE.Windows.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        Title="XLIMS"
+        WindowState="Maximized">
+    <DockPanel LastChildFill="True">
+        <Border DockPanel.Dock="Left" Width="40"
+                Background="Gray">
+            <ListBox ItemsSource="{Binding Activities}"
+                     SelectedItem="{Binding CurrentActivity,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">
+                <ListBox.ItemTemplate>
+                    <DataTemplate>
+                        <TextBlock Text="{Binding Title}"/>
+                    </DataTemplate>
+                </ListBox.ItemTemplate>
+            </ListBox>
+        </Border>
+        <ContentControl DataContext="{Binding CurrentActivity}" Content="{Binding View}"/>
+    </DockPanel>
+</Window>
+
+

XLIMS.CORE/Windows/MainWindow.xaml.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+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.Shapes;
+using XLIMS.CORE.ViewModels;
+
+namespace XLIMS.CORE.Windows
+{
+    /// <summary>
+    /// Логика взаимодействия для MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow(MainViewModel viewModel)
+        {
+            InitializeComponent();
+            DataContext = viewModel; // ViewModel уже содержит ILimsService и все подсервисы
+
+            // При необходимости загружаем данные
+            if (viewModel is MainViewModel vm)
+            {
+                //vm.LoadDataAsync(); // или Loaded событие
+            }
+        }
+    //    private void Window_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+    //    {
+    //        if (e.ChangedButton == MouseButton.Left)
+    //            DragMove();
+    //    }
+
+    //    private void Minimize_Click(object sender, RoutedEventArgs e) => WindowState = WindowState.Minimized;
+    //    private void Maximize_Click(object sender, RoutedEventArgs e) => WindowState = WindowState == WindowState.Maximized ? WindowState.Normal : WindowState.Maximized;
+    //    private void Close_Click(object sender, RoutedEventArgs e) => Close();
+    }
+}