如何判断使用QueryMultiple时返回哪些记录？

public class User {
    public int Id { get; set; }
    public string Name { get; set; }
}

public class Order {
    public int Id { get; set; }
    public int UserId { get; set; }
    public decimal Amount { get; set; }
}

string getUserQuery = "SELECT * FROM Users WHERE Id = @UserId";
string getOrderQuery = "SELECT * FROM Orders WHERE UserId = @UserId";

using (var connection = new SqlConnection(connectionString)) {
    connection.Open();
    
    using (var multi = connection.QueryMultiple(getUserQuery + ";" + getOrderQuery, new { UserId = 1 })) {
        var user = multi.Read<User>().FirstOrDefault();
        var orders = multi.Read<Order>().ToList();
        
        // 现在user变量包含用户信息，orders变量包含该用户的所有订单
    }
}