C# 如何设置代码优先实体

我正在与代码优先实体和数据注释的概念作斗争

我正在尝试创建一个数据库，其中包括一个人员表和一个集合表，它们通过一对多关系链接，因为每个集合中可能有许多人

如何准确地设置这些类来模拟一对多关系，更重要的是如何向每个表添加数据

我尝试了以下方法：

//Ensemble entity class
public class Ensemble
{
    [Key]
    public int ensembleID { get; set; }
    public string ensembleName { get; set; }

    public virtual List<People> persons { get; set; }

    public Ensemble (int ensembleID, string ensembleName)
    {
        this.ensembleID = ensembleID;
        this.ensembleName = ensembleName;
    }
}

// people entity class
    public class People
{
    [Key]
    public int personID { get; set; }
    [Required]
    public string firstname { get; set; }
    [Required]
    public string surname { get; set; }
    [Required]
    public DateTime birthDate { get; set; }
    public string cellphone { get; set; }
    public string email { get; set; }
    public bool inSchool { get; set; }  //  Are they currently in a primary or secondary school

    public int ensembleID { get; set; }
    //[ForeignKey("ensembleID")]
    public Ensemble Ensemble { get; set; }


    public People(int personID, string firstname, string surname, DateTime birthDate, string cellphone, string email, bool inSchool, int ensembleID)
    {
        this.personID = personID;
        this.firstname = firstname;
        this.surname = surname;
        this.birthDate = birthDate;
        this.cellphone = cellphone;
        this.email = email;
        this.inSchool = inSchool;
        this.ensembleID = ensembleID;
    }


    // Adding data
    context.People.Add(new People(1, "Adam", "Herd", new DateTime(1992, 3, 12), "0274578956", "adamherd1@live.com", true));
    context.Ensemble.Add(new Ensemble(1, "Little River Band"));

但是，这会返回一个错误。”INSERT语句与外键约束\FK_dbo.People_dbo.Ensembles_ensembleID\冲突。冲突发生在数据库\SMMC_adam_stacy.Context\、表\dbo.Ensembles\、列“ensembleID”中。\r\n语句已终止。}

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如需进一步解释导航属性的工作原理，如公共虚拟合奏合奏{get；set；}

请在合奏中向集合添加人员：

context.Ensemble.Add(new Ensemble(1, "Little River Band"));
context.People.Add(new People(1, "Adam", "Herd", new DateTime(1992, 3, 12), "0274578956", "adamherd1@live.com", true));

---

为回应干杯。不幸的是，这没有什么区别。

var ens = new Ensemble(1, "Little River Band");
var person = new People(1, "Adam", "Herd", new DateTime(1992, 3, 12),
                        "0274578956", "adamherd1@live.com", true)); 
                        // BTW: the constructor does not match the call
ens.persons.Add(person);
context.Ensemble.Add(ens);