osu/osu.Game/Migrations/20210824185035_AddCountdownSettings.cs

using Microsoft.EntityFrameworkCore.Migrations;

namespace osu.Game.Migrations
{
    public partial class AddCountdownSettings : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AddColumn<int>(
                name: "CountdownOffset",
                table: "BeatmapInfo",
                nullable: false,
                defaultValue: 0);
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropColumn(
                name: "CountdownOffset",
                table: "BeatmapInfo");
        }
    }
}