Minimal example for Entity Framework Core

efminimal.cs

using Microsoft.EntityFrameworkCore;

namespace EFCoreExample
{
    internal class Program
    {
        // Install Microsoft.EntityFrameworkCore and Microsoft.EntityFrameworkCore.SqlServer nuget packages.
        
        private static void Main(string[] args)
        {
            var optionsBuilder = new DbContextOptionsBuilder<AppDbContext>();
            var context = new AppDbContext(optionsBuilder.Options);
            context.Database.EnsureDeleted();
            context.Database.EnsureCreated();

            var element = new Element {Content = "abc"};
            context.Elements.Add(element);
            context.SaveChanges();
        }
    }

    internal class AppDbContext : DbContext
    {
        public DbSet<Element> Elements { get; set; }

        public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
            {
                //get connection string from https://www.connectionstrings.com/sql-server/
                optionsBuilder.UseSqlServer("<connection string>");
            }
        }
    }

    internal class Element
    {
        public int Id { get; set; }
        public string Content { get; set; }
    }
}