Dealing with One-to-Many Relationship in Fluent API

For example, a Company has many Jobs, in Company Configuration add
HasMany(c => c.Jobs)
.WithRequired(j => j.Company)
.HasForeignKey(j => j.CompanyId);
Without the above configuration, Company navigation property of Job will not work.

While in Job Configuration
HasRequired(j => j.Company)
.WithMany(c => c.Jobs)
.HasForeignKey(j => j.CompanyId);
Add the 2 configuration so that their navigational properties will work.