Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.
详细信息中没显示是哪个字段验证出错：
Validation failed for one or more entities解决方法
复制内容到剪贴板程序代码
}
结果显示：
引用内容
Imsi:The field Imsi must be a string or array type with a maximum length of '20'