Application ready before dependency injction

YouTubeViewers.WPF/ViewModels/YouTubeViewersListingItemViewModel.cs

@@ -20,6 +20,35 @@ namespace YouTubeViewers.WPF.ViewModels
 
         public string UserName => YouTubeViewer.Username;
 
+
+        #region IsDeleting
+
+        private bool _isDeleting;
+        public bool IsDeleting
+        {
+            get { return _isDeleting; }
+            set { _isDeleting = value; OnPropertyChanged(); }
+        }
+
+        #endregion IsDeleting
+
+        #region ErrorMessage
+
+        private string _errorMessage;
+        public string ErrorMessage
+        {
+            get { return _errorMessage; }
+            set
+            {
+                _errorMessage = value;
+                OnPropertyChanged(nameof(ErrorMessage));
+                OnPropertyChanged(nameof(HasErrorMessage));
+            }
+        }
+
+        #endregion ErrorMessage
+
+        public bool HasErrorMessage => !string.IsNullOrEmpty(ErrorMessage);
         public ICommand EditCommand { get; }
         public ICommand DeleteCommand { get; }