using System; using System.Collections.Generic; using System.Linq; namespace CockRoachDBEFCoreTest { public class Program { private static void Main(string[] args) { using var db = new MyDbContext(); if (db.Database.EnsureCreated()) { var user = new User { Name = "admin", UserRoles = new List { new UserRole{ Role=new Role{ Name="管理员" } } } }; db.Set().Add(user); db.SaveChanges(); } foreach (var item in db.Set()) { Console.WriteLine($"id:{item.Id},name:{item.Name}"); } Console.WriteLine(db.Set().Count()); } } }