public class ReadonlyDbContext : MyDbContext
{
    static ReadonlyDbContext()
    {
        Database.SetInitializer<ReadonlyDbContext>(null);
    }

    public ReadonlyDbContext()
    {
        SetConfigurationOptions();
    }

    private void SetConfigurationOptions()
    {
        Configuration.LazyLoadingEnabled = false;
        Configuration.AutoDetectChangesEnabled = false;
        Configuration.ProxyCreationEnabled = false;
    }

    public override int SaveChanges()
    {
        throw new Exception("Attempted to save using a read-only dbContext");
    }

    public override Task<int> SaveChangesAsync()
    {
        throw new Exception("Attempted to save using a read-only dbContext");
    }

    public override Task<int> SaveChangesAsync(CancellationToken cancellationToken)
    {
        throw new Exception("Attempted to save using a read-only dbContext");
    }
}