Corrected untracked MainWindowViewModel file.

src/ManVan/ViewModels/MainWindowViewModel.cs

@@ -0,0 +1,81 @@
+using System;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Windows;
+
+namespace ManVan
+{
+    public class MainWindowViewModel : INotifyPropertyChanged
+    {
+        public MainWindowViewModel()
+        {
+            OpenDetailsCommand = new OpenDetailsCommand(this);
+            NewEntryCommand = new NewEntryCommand(this);
+            ImportCommand = new ImportCommand(this);
+            ExportCommand = new ExportCommand(this);
+            ExportLabelsCommand = new ExportLabelsCommand(this);
+            ClearCommand = new ClearCommand(this);
+            Entries = LocalDataService.Load();
+
+            _exportVisibility = LeitzAddressBookService.IsLeitzIconInstalled
+                ? Visibility.Visible
+                : Visibility.Collapsed;
+        }
+
+        public ClearCommand ClearCommand { get; set; }
+
+        public ExportLabelsCommand ExportLabelsCommand { get; set; }
+
+        public ExportCommand ExportCommand { get; set; }
+
+        public ImportCommand ImportCommand { get; set; }
+
+        public NewEntryCommand NewEntryCommand { get; }
+
+        public OpenDetailsCommand OpenDetailsCommand { get; }
+
+        private Visibility _exportVisibility;
+
+        public Visibility ExportVisibility
+        {
+            get { return _exportVisibility; }
+            set
+            {
+                _exportVisibility = value;
+                OnPropertyChanged();
+            }
+        }
+
+        public ObservableCollection<EntryViewModel> Entries { get; set; }
+
+        public bool EntriesContainsId(Guid id)
+        {
+            return Entries.Any(entryViewModel => entryViewModel.Id == id);
+        }
+
+        public EntryViewModel SelectedEntry { get; set; }
+
+        public void Refresh()
+        {
+            OnPropertyChangedExplicit("Entries");
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        protected virtual void OnPropertyChanged(
+            [CallerMemberName] string propertyName = null)
+        {
+            PropertyChanged?.Invoke(
+                this, new PropertyChangedEventArgs(propertyName));
+        }
+
+        protected virtual void OnPropertyChangedExplicit(
+            string propertyName = null)
+        {
+            PropertyChanged?.Invoke(
+                this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}