定义主表字段,主表包含字表类型SettingResultTable即可

    public class SettingTable
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public SettingResultTable SettingResult { get; set; }
public byte MessageId { get; set; }
}

定义字表字段

    public class SettingResultTable
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public int AnRequestType { get; set; }
}

调用save

    _dataContext.SettingTables.Add(settingTable);
_dataContext.SaveChanges();

查询使用联合即可

var settingTables = _dataContext.SettingTables.Include(x=>x.SettingResult).ToList();