Name of Foreign Key EF6 - entity-framework

Question

My entity has a List<SecondEntityDTO>. When EF generates the table, in the table SecondEntities there's a column name FirstEntityDTO_id. I would like this column to be named "ParentEntity_id". How can I do that?
I tried annotating the List of SecondEntityDTO and a bunch of other things...
Edit1: I belive you guys missunderstood.
This is my MainEntity:
[Table("MainEntities")]
public class MainEntityDTO
{
public string Title { get; set; }
[Key]
public int id { get; set; }
public List<SubEntityDTO> SubEntities { get; set; }
}
This is SubEntityDTO:
[Table("SubEntities")]
public class SubEntityDTO
{
[Key]
public int id { get; set; }
public string Title { get; set; }
}
And this is the Migration:
public override void Up()
{
CreateTable(
"dbo.MainEntities",
c => new
{
id = c.Int(nullable: false, identity: true),
Title = c.String(),
Discriminator = c.String(nullable: false, maxLength: 128),
})
.PrimaryKey(t => t.id);
CreateTable(
"dbo.SubEntities",
c => new
{
id = c.Int(nullable: false, identity: true),
Title = c.String(),
MainEntityDTO_id = c.Int(),
})
.PrimaryKey(t => t.id)
.ForeignKey("dbo.MainEntities", t => t.MainEntityDTO_id)
.Index(t => t.MainEntityDTO_id);
}
Note the name of the third column on the SubEntities table!

Answer 1

Also, you can do the same using Fluent Api, for example, overwritting the OnModelCreating method of your Context and doing this:
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<SecondEntity>().Property(s => s.FirstEntityDTO_id).HasColumnName("ParentEntity_id");
}
Update
Why you don't edit Func<> that specifies the columns of that table. As you can see you are creating an anonymous type, so you can change the name of the column there, eg:
CreateTable(
"dbo.SubEntities",
c => new
{
id = c.Int(nullable: false, identity: true),
Title = c.String(),
ParentEntity_id = c.Int(),
})
.PrimaryKey(t => t.id)
.ForeignKey("dbo.MainEntities", t => t.ParentEntity_id)
.Index(t => t.ParentEntity_id);
If you do this, remember change the name of that property in the Down method, but if you already executed that script, don't change the FK name yet in the Down method. Execute again the Update Database command specifying the name of that script. That will drop those tables and they will be created once again using the Up method, but now with the FK name that you want it.In that moment is when you can change the FK name in the Down method:
public override void Down()
{
DropForeignKey("dbo.SubEntities", "ParentEntity_id", "dbo.MainEntities");
DropIndex("dbo.SubEntities", new[] { "ParentEntity_id" });
DropTable("dbo.SubEntities");
DropTable("dbo.MainEntities");
}

Answer 2

Put the following code in your SubEntity class:
[ForeignKey("ParentEntity")]
public int ParentEntity_id { get; set; }
public virtual MainEntity ParentEntity { get; set; }