diff --git a/PipeGallery/Model/ColumnGroupInfo.cs b/PipeGallery/Model/ColumnGroupInfo.cs
index 89a7b56..aa23ae8 100644
--- a/PipeGallery/Model/ColumnGroupInfo.cs
+++ b/PipeGallery/Model/ColumnGroupInfo.cs
@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
-using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Threading;
@@ -12,7 +11,6 @@
     [Serializable]
     public class ColumnGroupInfo : ChartBase
     {
-
         private List<ColumnInfo> _columnListInfo = new List<ColumnInfo>();
 
         public List<ColumnInfo> ColumnListInfo
@@ -25,7 +23,8 @@
         private double _maxy;
         private double _miny;
 
-        public override void DrawGeometricFigure(Canvas canvas, double maxy, double miny, CoordinatesInfoType coordinates)
+        public override void DrawGeometricFigure(Canvas canvas, double maxy, double miny,
+            CoordinatesInfoType coordinates)
         {
             _canvas = canvas;
             _maxy = maxy;
@@ -41,26 +40,23 @@
             //清空canvas
             _canvas.Children.Clear();
             _canvas.Visibility = Visibility.Hidden;
-            /* 线程优化1  
-            System.Threading.ThreadStart start = delegate ()
+
+            ThreadStart start = delegate()
             {
                 //Thread.Sleep(500);
-                App.Current.Dispatcher.BeginInvoke(new Action(() =>
-                {
-                    _canvas.Visibility = Visibility.Visible;
-                }), DispatcherPriority.Normal);
+                Application.Current.Dispatcher.BeginInvoke(new Action(() => { _canvas.Visibility = Visibility.Visible; }),
+                    DispatcherPriority.Normal);
             };
-            Thread t = new System.Threading.Thread(start);
+            Thread t = new Thread(start);
             t.IsBackground = true;
             t.Start();
-             * */
-            Task t = new Task(()=> {
-                App.Current.Dispatcher.BeginInvoke(new Action(() =>
-                {
-                    _canvas.Visibility = Visibility.Visible;
-                }), DispatcherPriority.Normal);
-            });
 
+            // Task t = new Task(()=> {
+            //     App.Current.Dispatcher.BeginInvoke(new Action(() =>
+            //     {
+            //         _canvas.Visibility = Visibility.Visible;
+            //     }), DispatcherPriority.Normal);
+            // });
 
             //坐标轴的左边沿的X坐标点
             double xs = 0;
@@ -83,7 +79,6 @@
             }
         }
 
-
         public override double GetMaxValue()
         {
             double max = double.MinValue;
@@ -113,8 +108,7 @@
                 if (min > tmpMin)
                     min = tmpMin;
             }
-
             return min;
         }
     }
-}
+}
\ No newline at end of file