NetFx40 LegacySecurityPolicy Design Mode: DM

问题：

To avoid potential data loss when being loaded with a designer beforehand, all errors must be resolved.

This method explicitly employs CAS policy, which has since been superseded by the .NET Framework. To maintain CAS policy for compatibility purposes, it is advisable to activate the NetFx40 Legacy Security Policy configuration option. For additional details, please refer to http://go.microsoft.com/fwlink/?LinkID=155570.

当我将VS2005项目的代码迁移到VS2010开发环境时，在编译过程中遇到了这个问题。随后发现由于主界面无法加载此错误信息而影响了程序运行，并进一步排查后发现问题源于对DevExpress控件的调用。因此根据错误提示找到了相应的解决方案。

[http://msdn.microsoft.com/zh-cn/library/micros