More modernization

- Split generic "common" libraries into specific libraries
- Use other packages in lieu of custom code
- General cleanup

Application/Options/CategoryWindow.xaml.cs

@@ -1,8 +1,5 @@
-using Common.Wpf.Extensions;
-using System.Linq;
+using CKaczor.Wpf.Validation;
 using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
 
 namespace FeedCenter.Options
 {
@@ -19,7 +16,9 @@ namespace FeedCenter.Options
             DataContext = category;
 
             // Set the title based on the state of the category
-            Title = string.IsNullOrWhiteSpace(category.Name) ? Properties.Resources.CategoryWindowAdd : Properties.Resources.CategoryWindowEdit;
+            Title = string.IsNullOrWhiteSpace(category.Name)
+                ? Properties.Resources.CategoryWindowAdd
+                : Properties.Resources.CategoryWindowEdit;
 
             // Set the window owner
             Owner = owner;
@@ -30,29 +29,8 @@ namespace FeedCenter.Options
 
         private void HandleOkayButtonClick(object sender, RoutedEventArgs e)
         {
-            // Get a list of all explicit binding expressions
-            var bindingExpressions = this.GetBindingExpressions(new[] { UpdateSourceTrigger.Explicit });
-
-            // Loop over each binding expression and clear any existing error
-            bindingExpressions.ForEach(b => Validation.ClearInvalid(b.BindingExpression));
-
-            // Force all explicit bindings to update the source
-            bindingExpressions.ForEach(bindingExpression => bindingExpression.BindingExpression.UpdateSource());
-
-            // See if there are any errors
-            var hasError = bindingExpressions.Exists(bindingExpression => bindingExpression.BindingExpression.HasError);
-
-            // If there was an error then set focus to the bad controls
-            if (hasError)
-            {
-                // Get the first framework element with an error
-                var firstErrorElement = bindingExpressions.First(b => b.BindingExpression.HasError).FrameworkElement;
-
-                // Set focus
-                firstErrorElement.Focus();
-
+            if (!this.Validate())
                 return;
-            }
 
             // Dialog is good
             DialogResult = true;
@@ -61,4 +39,4 @@ namespace FeedCenter.Options
             Close();
         }
     }
-}
+}