fixed #313

src/Shared/HandyControlDemo_Shared/UserControl/Main/LeftMainContent.xaml

@@ -24,7 +24,7 @@
         </Style>
     </Border.Resources>
     <DockPanel>
-        <Button Command="{Binding OpenOverviewCmd}" DockPanel.Dock="Top" HorizontalAlignment="Stretch" Margin="4,4,4,0" Content="{x:Static langs:Lang.Overview}"/>
+        <Button Command="{Binding OpenOverviewCmd}" DockPanel.Dock="Top" HorizontalAlignment="Stretch" Margin="4" Content="{x:Static langs:Lang.Overview}"/>
         <TabControl SelectionChanged="TabControl_OnSelectionChanged" ItemsSource="{Binding DemoInfoList}" Style="{StaticResource TabControlInLine}" Background="Transparent" SelectedIndex="0">
             <TabControl.ItemTemplate>
                 <DataTemplate>

src/Shared/HandyControl_Shared/Controls/Input/NumericUpDown.cs

@@ -196,13 +196,7 @@ namespace HandyControl.Controls
                 ctl.Value = maximum;
             }
 
-            var result = num > maximum ? maximum : num;
-            if (!ctl.DecimalPlaces.HasValue)
-            {
-                result = Math.Floor(result);
-            }
-
-            return result;
+            return num > maximum ? maximum : num;
         }
 
         /// <summary>