diff --git a/Windows/CDKEY.xaml.cs b/Windows/CDKEY.xaml.cs
index a75335a..5b689ee 100644
--- a/Windows/CDKEY.xaml.cs
+++ b/Windows/CDKEY.xaml.cs
@@ -191,8 +191,6 @@ namespace formula_manage.Windows
             string t;
             t = sn_id.Text.Substring(0,6);
 
-
-
             cdk.Text = t +"240102" + CRCcheck16.ToCRC16(CRCcheck16.StringToHexByte(t+ "240102"),true);
 
         }