using System;

using Microsoft.EntityFrameworkCore;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var options = new DbContextOptionsBuilder<MyDbContext>()

                        .UseInMemoryDatabase(databaseName: "TestDatabase")

                        .Options;

​

        using(var context = new MyDbContext(options))

        {

            context.DataRecords.Add(new DataRecord { Value = 10 });

            context.SaveChanges();

​

            var entityType = context.Model.FindEntityType(typeof(DataRecord));

            var entityTableMappings = entityType?.GetTableMappings().ToArray();

        }

    }

​

    public class MyDbContext : DbContext

    {

        public MyDbContext(DbContextOptions options) : base(options)

        {

            Console.WriteLine("MyDbContext.ctor(DbContextOptions)");

        }

​

        protected override void OnModelCreating(ModelBuilder modelBuilder)

        {

            base.OnModelCreating(modelBuilder);

            Console.WriteLine("MyDbContext.OnModelCreating(ModelBuilder)");

        }

        public DbSet<DataRecord> DataRecords {get;set;}

    }

​

    public class DataRecord

    {

        public int Id {get;set;}

        public decimal Value {get; set;}

    }

}

​