How to make lazy-loading work with EF Core 2.1.0 and proxies

Question

I have the following models:

public class Session
{
    public int SessionID { get; set; }
    public int UserID { get; set; }

    public virtual User User          


        

Answer 1

Steps To Configure Lazy Loading with Proxies in Asp.net Core 2.1

1. Install Microsoft.EntityFrameworkCore.Proxies package
2. Enable LazyLoadingProxies You can enable it with a call to UseLazyLoadingProxies:

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    => optionsBuilder
        .UseLazyLoadingProxies()
        .UseSqlServer(myConnectionString);

Or when using AddDbContext:

.AddDbContext(
b => b.UseLazyLoadingProxies()
      .UseSqlServer(myConnectionString));

3. EF Core will then enable lazy loading for any navigation property that can be overridden--that is, it must be virtual.