ef-core-override-conventions

public static IServiceCollection InitDatabaseContext(this IServiceCollection services, string connectionString)
        {
            services.AddDbContext<AppDbContext>(opts =>
            {
                opts.UseSqlServer(connectionString);
                opts.ReplaceService<IConventionSetBuilder, CustomSetBuilder>();
            });

            return services;
        }

        public class CustomSetBuilder : SqlServerConventionSetBuilder
        {
            public CustomSetBuilder(RelationalConventionSetBuilderDependencies dependencies, ISqlGenerationHelper sqlGenerationHelper) : base(dependencies, sqlGenerationHelper)
            {

            }

            public override ConventionSet AddConventions(ConventionSet conventionSet)
            {
                var et = conventionSet.ForeignKeyAddedConventions.FirstOrDefault(f => f is ForeignKeyIndexConvention);
                if (et != null)
                    conventionSet.ForeignKeyAddedConventions.Remove(et);

                return base.AddConventions(conventionSet);
            }
        }