如何跨上下文共享表格?

请参阅下面的代码,这是我从CQRS在线教程中借用的:

public class OrderReadContext: DbContext
    {
      public OrderReadContext() : base("name=GeekStuffSales") {

      }
      public DbSet<SalesOrder> Orders { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder) {
      modelBuilder.HasDefaultSchema("Order");
   }
  }
  public class OrderSystemContextConfig : DbConfiguration
  {
    public OrderSystemContextConfig() {
      SetDatabaseInitializer(new NullDatabaseInitializer<OrderReadContext>());
    }

  }

public class OrderWriteContext : DbContext
  {
    public OrderWriteContext() : base("name=GeekStuffSales")
    {
    }

    public DbSet<SalesOrder> Orders { get; set; }
    public DbSet<LineItem> LineItems { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
      modelBuilder.HasDefaultSchema("Order");
      modelBuilder.Entity<SalesOrder>().Ignore(s => s.LineItems);
    }
  }

  public class OrderSystemContextConfig : DbConfiguration
  {
    public OrderSystemContextConfig()
    {
      SetDatabaseInitializer(new NullDatabaseInitializer<OrderWriteContext>());
    }
  }

我理解这里发生的事情,即不能两次创建同一个表。我只想创建一个数据库表,供这两个上下文使用。我该怎么做?