diff --git a/Demo/Editor/ChartModuleDrawer.cs b/Demo/Editor/ChartModuleDrawer.cs
index e2715f2f..b8cfbf88 100644
--- a/Demo/Editor/ChartModuleDrawer.cs
+++ b/Demo/Editor/ChartModuleDrawer.cs
@@ -6,8 +6,6 @@ namespace XCharts
     [CustomPropertyDrawer(typeof(ChartModule), true)]
     public class ChartModuleDrawer : PropertyDrawer
     {
-        bool m_BarModuleToggle = true;
-
         public override void OnGUI(Rect pos, SerializedProperty prop, GUIContent label)
         {
             Rect drawRect = pos;
diff --git a/Demo/Scripts/Demo.cs b/Demo/Scripts/Demo.cs
index e9d906c3..b615d41a 100644
--- a/Demo/Scripts/Demo.cs
+++ b/Demo/Scripts/Demo.cs
@@ -85,7 +85,6 @@ public class Demo : MonoBehaviour
 
     void InitModuleButton()
     {
-        var font = Resources.GetBuiltinResource<Font>("Arial.ttf");
         var btnPanel = transform.Find("chart_list");
         m_BtnClone = transform.Find("btn_clone").gameObject;
         m_BtnClone.SetActive(false);
@@ -104,7 +103,7 @@ public class Demo : MonoBehaviour
                 btn = GameObject.Instantiate(m_BtnClone);
                 btn.SetActive(true);
                 btn.name = btnName;
-                btn.transform.parent = btnPanel;
+                btn.transform.SetParent(btnPanel);
                 btn.transform.localPosition = Vector3.zero;
             }
             btn.transform.localScale = Vector3.one;
diff --git a/Scripts/Editor/BaseChartEditor.cs b/Scripts/Editor/BaseChartEditor.cs
index 6ac4b982..312520db 100644
--- a/Scripts/Editor/BaseChartEditor.cs
+++ b/Scripts/Editor/BaseChartEditor.cs
@@ -28,15 +28,9 @@ namespace XCharts
 
         protected float m_DefaultLabelWidth;
         protected float m_DefaultFieldWidth;
-
         private int m_SeriesSize;
-
-
-        private bool m_ThemeModuleToggle = false;
         private bool m_BaseModuleToggle = false;
 
-
-
         protected virtual void OnEnable()
         {
             m_Target = (BaseChart)target;
diff --git a/Scripts/Editor/PropertyDrawers/SerieDrawer.cs b/Scripts/Editor/PropertyDrawers/SerieDrawer.cs
index 3534e1d3..7d23179c 100644
--- a/Scripts/Editor/PropertyDrawers/SerieDrawer.cs
+++ b/Scripts/Editor/PropertyDrawers/SerieDrawer.cs
@@ -10,7 +10,6 @@ namespace XCharts
 
         private List<bool> m_SerieModuleToggle = new List<bool>();
         private List<bool> m_DataFoldout = new List<bool>();
-        private int m_DataSize = 0;
         private bool m_ShowJsonDataArea = false;
         private string m_JsonDataAreaText;
 
@@ -160,8 +159,6 @@ namespace XCharts
                 EditorGUIUtility.fieldWidth = lastFieldWid;
                 EditorGUIUtility.labelWidth = lastLabelWid;
             }
-            SerializedProperty element1 = data.GetArrayElementAtIndex(0);
-            SerializedProperty element2 = data.GetArrayElementAtIndex(1);
         }
 
         public override float GetPropertyHeight(SerializedProperty prop, GUIContent label)
diff --git a/Scripts/Editor/PropertyDrawers/SerieSymbolDrawer.cs b/Scripts/Editor/PropertyDrawers/SerieSymbolDrawer.cs
index b5699774..8f45859e 100644
--- a/Scripts/Editor/PropertyDrawers/SerieSymbolDrawer.cs
+++ b/Scripts/Editor/PropertyDrawers/SerieSymbolDrawer.cs
@@ -7,13 +7,6 @@ namespace XCharts
     [CustomPropertyDrawer(typeof(SerieSymbol), true)]
     public class SerieSymbolDrawer : PropertyDrawer
     {
-
-        private List<bool> m_SerieModuleToggle = new List<bool>();
-        private List<bool> m_DataFoldout = new List<bool>();
-        private int m_DataSize = 0;
-        private bool m_ShowJsonDataArea = false;
-        private string m_JsonDataAreaText;
-
         public override void OnGUI(Rect pos, SerializedProperty prop, GUIContent label)
         {
             Rect drawRect = pos;
@@ -26,9 +19,6 @@ namespace XCharts
             SerializedProperty m_DataScale = prop.FindPropertyRelative("m_DataScale");
             SerializedProperty m_SelectedDataScale = prop.FindPropertyRelative("m_SelectedDataScale");
 
-            SerializedProperty m_SizeCallback = prop.FindPropertyRelative("m_SizeCallback");
-            SerializedProperty m_SelectedSizeCallback = prop.FindPropertyRelative("m_SelectedSizeCallback");
-
             EditorGUI.PropertyField(drawRect, m_Type, new GUIContent("Symbol Type"));
             drawRect.y += EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing;
             EditorGUI.PropertyField(drawRect, m_SizeType, new GUIContent("Symbol SizeType"));
diff --git a/Scripts/UI/BarChart.cs b/Scripts/UI/BarChart.cs
index a44180a7..a1054995 100644
--- a/Scripts/UI/BarChart.cs
+++ b/Scripts/UI/BarChart.cs
@@ -167,7 +167,6 @@ namespace XCharts
             serieNameSet.Clear();
             for (int j = 0; j < seriesCount; j++)
             {
-                var seriesHig = new Dictionary<int, float>();
                 var serieList = stackSeries[j];
                 seriesCurrHig.Clear();
                 if (seriesCurrHig.Capacity != serieList[0].dataCount)
diff --git a/Scripts/UI/ScatterChart.cs b/Scripts/UI/ScatterChart.cs
index 8eb85972..6080d720 100644
--- a/Scripts/UI/ScatterChart.cs
+++ b/Scripts/UI/ScatterChart.cs
@@ -89,7 +89,6 @@ namespace XCharts
                 int maxCount = maxShowDataNumber > 0 ?
                     (maxShowDataNumber > serie.dataCount ? serie.dataCount : maxShowDataNumber)
                     : serie.dataCount;
-                int dataCount = (maxCount - minShowDataNumber);
                 for (int n = minShowDataNumber; n < maxCount; n++)
                 {
                     float xValue, yValue;
diff --git a/Scripts/UI/Utility/ChartHelper.cs b/Scripts/UI/Utility/ChartHelper.cs
index 99329fcd..0e57f4a2 100644
--- a/Scripts/UI/Utility/ChartHelper.cs
+++ b/Scripts/UI/Utility/ChartHelper.cs
@@ -84,7 +84,7 @@ namespace XCharts
             {
                 obj = new GameObject();
                 obj.name = name;
-                obj.transform.parent = parent;
+                obj.transform.SetParent(parent);
                 obj.transform.localScale = Vector3.one;
                 obj.transform.localPosition = Vector3.zero;
             }