fixed #248

src/Shared/HandyControl_Shared/Controls/SideMenu/SideMenu.cs

@@ -40,6 +40,8 @@ namespace HandyControl.Controls
             {
                 if (item.Role == SideMenuItemRole.Item)
                 {
+                    _isItemSelected = true;
+
                     if (Equals(item, _selectedItem)) return;
 
                     if (_selectedItem != null)
@@ -53,7 +55,6 @@ namespace HandyControl.Controls
                     {
                         Info = e.OriginalSource
                     });
-                    _isItemSelected = true;
                 }
                 else
                 {
@@ -92,7 +93,10 @@ namespace HandyControl.Controls
                     }
                     else if(_selectedHeader != null)
                     {
-                        _selectedHeader.SelectDefaultItem();
+                        if (AutoSelect)
+                        {
+                            _selectedHeader.SelectDefaultItem();
+                        }
                         _isItemSelected = false;
                     }
                 }
@@ -117,6 +121,15 @@ namespace HandyControl.Controls
 
         protected override bool IsItemItsOwnContainerOverride(object item) => item is SideMenuItem;
 
+        public static readonly DependencyProperty AutoSelectProperty = DependencyProperty.Register(
+            "AutoSelect", typeof(bool), typeof(SideMenu), new PropertyMetadata(ValueBoxes.TrueBox));
+
+        public bool AutoSelect
+        {
+            get => (bool) GetValue(AutoSelectProperty);
+            set => SetValue(AutoSelectProperty, value);
+        }
+
         public static readonly DependencyProperty ExpandModeProperty = DependencyProperty.Register(
             "ExpandMode", typeof(ExpandMode), typeof(SideMenu), new PropertyMetadata(default(ExpandMode), OnExpandModeChanged));