diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index 11b95c75..55034133 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/SunnyUI/Charts/UIChart.cs b/SunnyUI/Charts/UIChart.cs
index 1e4e60ab..9386fed0 100644
--- a/SunnyUI/Charts/UIChart.cs
+++ b/SunnyUI/Charts/UIChart.cs
@@ -198,7 +198,7 @@ namespace Sunny.UI
             {
                 float size = SubFont != null ? SubFont.Size : UIFontColor.SubFontSize;
 
-                if (tmpFont == null || !tmpFont.Size.EqualsFloat(size / this.DPIScale()))
+                if (tmpFont == null || !tmpFont.Size.EqualsFloat(size / UIDPIScale.DPIScale()))
                 {
                     tmpFont?.Dispose();
                     tmpFont = this.DPIScaleFont(Font, size);
@@ -216,7 +216,7 @@ namespace Sunny.UI
             {
                 float size = LegendFont != null ? LegendFont.Size : UIFontColor.SubFontSize;
 
-                if (tmpLegendFont == null || !tmpLegendFont.Size.EqualsFloat(size / this.DPIScale()))
+                if (tmpLegendFont == null || !tmpLegendFont.Size.EqualsFloat(size / UIDPIScale.DPIScale()))
                 {
                     tmpLegendFont?.Dispose();
                     tmpLegendFont = this.DPIScaleFont(Font, size);
diff --git a/SunnyUI/Controls/DropItem/UIDateItem.cs b/SunnyUI/Controls/DropItem/UIDateItem.cs
index 6c7906b6..cbeb96c5 100644
--- a/SunnyUI/Controls/DropItem/UIDateItem.cs
+++ b/SunnyUI/Controls/DropItem/UIDateItem.cs
@@ -728,7 +728,7 @@ namespace Sunny.UI
 
             if (ShowToday)
             {
-                using (Font SubFont = new Font("微软雅黑", 10.5f / this.DPIScale()))
+                using (Font SubFont = new Font("微软雅黑", 10.5f / UIDPIScale.DPIScale()))
                 {
                     e.Graphics.FillRectangle(p3.FillColor, p3.Width - width * 4 + 1, p3.Height - height + 1, width * 4 - 2, height - 2);
                     e.Graphics.FillRoundRectangle(PrimaryColor, new Rectangle(p3.Width - width * 4 + 6, p3.Height - height + 3, 8, height - 10), 3);
diff --git a/SunnyUI/Controls/DropItem/UIDateTimeItem.cs b/SunnyUI/Controls/DropItem/UIDateTimeItem.cs
index f4a2cd52..9500b08a 100644
--- a/SunnyUI/Controls/DropItem/UIDateTimeItem.cs
+++ b/SunnyUI/Controls/DropItem/UIDateTimeItem.cs
@@ -1279,7 +1279,7 @@ namespace Sunny.UI
 
             if (ShowToday)
             {
-                using (Font SubFont = new Font("微软雅黑", 10.5f / this.DPIScale()))
+                using (Font SubFont = new Font("微软雅黑", 10.5f / UIDPIScale.DPIScale()))
                 {
                     e.Graphics.FillRectangle(p3.FillColor, p3.Width - width * 4 + 1, p3.Height - height + 1, width * 4 - 2, height - 2);
                     e.Graphics.FillRoundRectangle(PrimaryColor, new Rectangle((int)(p3.Width - width * 4 + 6), p3.Height - height + 3, 8, height - 10), 3);
diff --git a/SunnyUI/Forms/UIForm.cs b/SunnyUI/Forms/UIForm.cs
index ef6297d6..55cc4c29 100644
--- a/SunnyUI/Forms/UIForm.cs
+++ b/SunnyUI/Forms/UIForm.cs
@@ -90,7 +90,7 @@ namespace Sunny.UI
             {
                 this.SetDPIScaleFont();
 
-                if (!this.DPIScale().Equals(1))
+                if (!UIDPIScale.DPIScaleIsOne())
                 {
                     TitleFont = this.DPIScaleFont(TitleFont);
                 }
diff --git a/SunnyUI/Frames/UIPage.cs b/SunnyUI/Frames/UIPage.cs
index fb762dc2..feca78c8 100644
--- a/SunnyUI/Frames/UIPage.cs
+++ b/SunnyUI/Frames/UIPage.cs
@@ -83,7 +83,7 @@ namespace Sunny.UI
             if (!IsScaled)
             {
                 this.SetDPIScaleFont();
-                if (!this.DPIScale().Equals(1))
+                if (!UIDPIScale.DPIScaleIsOne())
                 {
                     this.TitleFont = this.DPIScaleFont(this.TitleFont);
                 }
diff --git a/SunnyUI/Style/UIDPIScale.cs b/SunnyUI/Style/UIDPIScale.cs
index 411e3234..05ef635c 100644
--- a/SunnyUI/Style/UIDPIScale.cs
+++ b/SunnyUI/Style/UIDPIScale.cs
@@ -32,25 +32,15 @@ namespace Sunny.UI
             return GDI.Graphics().DpiX / 96.0f;
         }
 
-        public static float DPIScale(this Control control)
+        public static bool DPIScaleIsOne()
         {
-            try
-            {
-                if (control != null)
-                    return control.CreateGraphics().DpiX / 96.0f;
-                else
-                    return GDI.Graphics().DpiX / 96.0f;
-            }
-            catch
-            {
-                return 1;
-            }
+            return DPIScale().EqualsFloat(1);
         }
 
         public static float DPIScaleFontSize(this Control control, Font font)
         {
             if (UIStyles.DPIScale)
-                return font.Size / control.DPIScale();
+                return font.Size / DPIScale();
             else
                 return font.Size;
         }
@@ -96,9 +86,9 @@ namespace Sunny.UI
             if (UIStyles.DPIScale)
             {
                 if (font.GdiCharSet == 134)
-                    return new Font(font.FontFamily, fontSize / control.DPIScale(), font.Style, font.Unit, font.GdiCharSet);
+                    return new Font(font.FontFamily, fontSize / DPIScale(), font.Style, font.Unit, font.GdiCharSet);
                 else
-                    return new Font(font.FontFamily, fontSize / control.DPIScale());
+                    return new Font(font.FontFamily, fontSize / DPIScale());
             }
             else
             {
@@ -112,7 +102,7 @@ namespace Sunny.UI
         public static void SetDPIScaleFont(this Control control)
         {
             if (!UIStyles.DPIScale) return;
-            if (!DPIScale().EqualsFloat(1))
+            if (!UIDPIScale.DPIScaleIsOne())
             {
                 if (control is IStyleInterface ctrl)
                 {
diff --git a/SunnyUI/Style/UIStyle.cs b/SunnyUI/Style/UIStyle.cs
index 8be62d94..1303347c 100644
--- a/SunnyUI/Style/UIStyle.cs
+++ b/SunnyUI/Style/UIStyle.cs
@@ -415,13 +415,13 @@ namespace Sunny.UI
         {
             foreach (var form in Forms.Values)
             {
-                if (!form.DPIScale().EqualsFloat(1))
+                if (!UIDPIScale.DPIScaleIsOne())
                     form.SetDPIScale();
             }
 
             foreach (var page in Pages.Values)
             {
-                if (!page.DPIScale().EqualsFloat(1))
+                if (!UIDPIScale.DPIScaleIsOne())
                     page.SetDPIScale();
             }
         }