解决了问题。 手动断开 DataLabelViewModel 与 ContentControl 的联系。 让GC可以释放

WpfApp1/ColumnRangeExample.xaml

@@ -31,7 +31,8 @@
                 <TextBlock Text="运行中"/>
                 <TextBlock Text="{Binding IsRunning,Mode=OneWay}"/>
             </StackPanel>
-            <Button Content="Update" Width="80" Padding="5" Click="Button_Click"/>
+            <Button Content="定时更新" Width="80" Padding="5" Click="Button_Click"/>
+            <Button Content="清空" Width="80" Padding="5" Click="ButtonClear_Click"/>
             <Button Content="GC" Width="80" Padding="5" Click="ButtonGC_Click"/>
         </StackPanel>
     </Grid>

WpfApp1/ColumnRangeExample.xaml.cs

@@ -46,6 +46,12 @@ namespace WpfApp1
         {
             GC.Collect();
         }
+
+
+        private void ButtonClear_Click(object sender, RoutedEventArgs e)
+        {
+            viewModel.BoltValues.Clear();
+        }
     }
     public class ColumnRangeExampleViewModel : INotifyPropertyChanged
     {
@@ -61,8 +67,8 @@ namespace WpfApp1
         List<double> datas = new List<double>();
         List<Bolt> boltmap = new List<Bolt>();
 
-        ChartValues<BoltValue> BoltValues = new ChartValues<BoltValue>();
-        ChartValues<double> Values = new ChartValues<double>();
+        public ChartValues<BoltValue> BoltValues = new ChartValues<BoltValue>();
+        public ChartValues<double> Values = new ChartValues<double>();
 
         
 
@@ -178,7 +184,7 @@ Configuration = Mappers.Weighted<BoltValue>()
             Update();
 
             timer = new DispatcherTimer();
-            timer.Interval = TimeSpan.FromSeconds(1);
+            timer.Interval = TimeSpan.FromSeconds(0.1);
             timer.Tick += Timer_Tick;
         }
         public void Start()

WpfView/Points/ColumnPointView.cs

@@ -183,6 +183,9 @@ namespace LiveCharts.Wpf.Points
             chart.View.RemoveFromDrawMargin(HoverShape);
             chart.View.RemoveFromDrawMargin(Rectangle);
             chart.View.RemoveFromDrawMargin(DataLabel);
+            //feng
+            DataLabel.Content = null;
+
         }
 
         public override void OnHover(ChartPoint point)