Add settings window

Options/GeneralOptionsPanel.xaml.cs

@@ -0,0 +1,42 @@
+using Common.Wpf.Extensions;
+using System.Windows;
+
+namespace ProcessCpuUsageStatusWindow.Options
+{
+    public partial class GeneralOptionsPanel
+    {
+        public GeneralOptionsPanel()
+        {
+            InitializeComponent();
+        }
+
+        public override void LoadPanel(object data)
+        {
+            base.LoadPanel(data);
+
+            var settings = Properties.Settings.Default;
+
+            StartWithWindows.IsChecked = settings.AutoStart;
+            NumberOfProcesses.Text = settings.ProcessCount.ToString();
+        }
+
+        public override bool ValidatePanel()
+        {
+            return true;
+        }
+
+        public override void SavePanel()
+        {
+            var settings = Properties.Settings.Default;
+
+            if (StartWithWindows.IsChecked.HasValue && settings.AutoStart != StartWithWindows.IsChecked.Value)
+                settings.AutoStart = StartWithWindows.IsChecked.Value;
+
+            settings.ProcessCount = int.Parse(NumberOfProcesses.Text);
+
+            Application.Current.SetStartWithWindows(settings.AutoStart);
+        }
+
+        public override string CategoryName => Properties.Resources.OptionCategory_General;
+    }
+}