/// <summary>
 /// 转换为用户权限数据传输对象
 /// </summary>
 /// <param name="entity">用户权限实体</param>
 public static UserPermissionDto ToDto(this UserPermission entity)
 {
     if (entity == null)
     {
         return(new UserPermissionDto());
     }
     return(entity.MapTo <UserPermissionDto>());
 }