具有多个DBContexts或多个存储库的存储库，每个存储库有一个DBContext？

using (var transaction = await firstDbContext.Database.BeginTransactionAsync())
{
    try
    {
        // 执行第一个DBContext的操作
        await firstDbContext.SaveChangesAsync();

        using (var secondDbContext = new SecondDbContext())
        {
            // 执行第二个DBContext的操作
            await secondDbContext.SaveChangesAsync();
        }

        await transaction.CommitAsync();
    }
    catch (Exception)
    {
        await transaction.RollbackAsync();
        throw;
    }
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext<FirstDbContext>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("FirstDbConnection")));

    services.AddDbContext<SecondDbContext>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("SecondDbConnection")));

    // 其他服务配置...
}

public class UserDbContext : DbContext
{
    public DbSet<User> Users { get; set; }

    public UserDbContext(DbContextOptions<UserDbContext> options) : base(options) { }
}

public class OrderDbContext : DbContext
{
    public DbSet<Order> Orders { get; set; }

    public OrderDbContext(DbContextOptions<OrderDbContext> options) : base(options) { }
}

{
  "ConnectionStrings": {
    "UserDbConnection": "Server=localhost;Database=UserDb;Trusted_Connection=True;",
    "OrderDbConnection": "Server=localhost;Database=OrderDb;Trusted_Connection=True;"
  }
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddDbContext<UserDbContext>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("UserDbConnection")));

    services.AddDbContext<OrderDbContext>(options =>
        options.UseSqlServer(Configuration.GetConnectionString("OrderDbConnection")));

    // 其他服务配置...
}