Add project files.

VirtualKeyboard/Views/SpecialCharactersView.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.Navigation;
+using System.Windows.Shapes;
+
+namespace VirtualKeyboard.Wpf.Views
+{
+    /// <summary>
+    /// Logika interakcji dla klasy SpecialCharactersView.xaml
+    /// </summary>
+    partial class SpecialCharactersView : UserControl
+    {
+        public SpecialCharactersView()
+        {
+            InitializeComponent();
+        }
+    }
+}