How to solve "LINQ to Entities only supports casting EDM primitive or enumeration types." error?

如何解决“实体LINQ支持铸造加工的原始或枚举类型。”错误？

youdao

How to solve "LINQ to Entities only supports casting EDM primitive or enumeration types." error?

如何解决“实体LINQ支持铸造加工的原始或枚举类型。”错误？

youdao