Foreign key relationship - asp.net

Question

I'm trying to setup a foreign key using the following two classes.
I want to use pAcqType as an enum and store the names of the types in another table. How should I setup my classes to do this?
public class Property
{
[Key]
public int pID { get; set; }
public string pAddress { get; set; }
public string pCounty { get; set; }
public string pCity { get; set; }
public string pState { get; set; }
public string pzip { get; set; }
public virtual PropertyAcquisitionType pAcqType { get; set; } <-- foreign key
}
public class PropertyAcquisitionType
{
[Key]
public int patID { get; set; }
public string patName { get; set; }
}
UPDATE
Dan got me thinking. And I tried the following and it seems to have worked out.
It setup the foreign key on the table like I wanted. And it didn't even ask for an inverse on the other table.
public int? pAcqType { get; set; }
[ForeignKey("pAcqType")]
public PropertyAcquisitionType patID { get; set; }

Answer 1

Is the foreign key required (NOT NULL in the database)?
public int pAcqTypeId { get; set; }
[ForeignKey("pAcqTypeId")]
public virtual PropertyAcquisitionType pAcqType { get; set; }
Otherwise,
public int? pAcqTypeId { get; set; }
[ForeignKey("pAcqTypeId")]
public virtual PropertyAcquisitionType pAcqType { get; set; }
Then in your other class, add an inverse relationship:
public class PropertyAcquisitionType
{
[Key]
public int patID { get; set; }
public string patName { get; set; }
[InverseProperty("pAcqType")]
public virtual ICollection<Property> pOfThisType { get; set; }
}
Here is one way you could define the relationship using the fluent API (without attributes in the entity classes). Note with this method, you should not need to add a properties property on the PropertyAcquisitionType entity to satisfy the inverse side of the relationship, because the .WithMany() tells EF what it needs to know:
public class MyDbContext : DbContext
{
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Property>()
.HasKey(x => x.pID)
.HasRequired(x => x.pAcqType) // or HasOptional if using int?
.WithMany() // or WithMany(x => x.pOfThisType) if you want to add / keep the inverse property
.HasForeignKey(x => x.pAcqTypeId)
;
}
}