Set up an Entity Framework database with one-to-many relationships using Code First

EfRelationships.cs

using MyProject.Models;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration.Conventions;

namespace MyProject.Database
{
    public class ArchiveDatabase : DbContext
    {
        //  add a connection string in Web.config
        // <add name="MyConnection" connectionString="Server=localhost;Database=MyDatabase;Trusted_Connection=true;" providerName="System.Data.SQLClient" />
        public MyDatabase() : base("MyConnection") { }

        public DbSet<Case> Cases { get; set; }
        public DbSet<Client> Clients { get; set; }
        public DbSet<Matter> Matters { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            // add one-to-many relationships

            modelBuilder.Entity<Client>().HasMany(cl => cl.Matters);
            modelBuilder.Entity<Matter>().HasMany(m => m.Cases);

            // remove cascading delete restriction
            modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();   
            
            base.OnModelCreating(modelBuilder);
        }
    }
}