C#测试问题 小白求助

Question

Please write the class header for class Flight together with instance variables for the flight number (a string) and the ticket price (in dollars and cents), and references to the origin and destination airports. Please use the appropriate types.

这个references 到初始和目的地机场要怎么做？？class里不是不能用ref吗？

Answer 1

问题没描述清楚。