用C#开发的公交转乘的程序，通过集合论的思想，找到转乘次数最少的路径方法（实验数据是上海地铁线）。vs2008打开，并可以直接运行。-C# development with public transport interchange program, through the ideas of set theory, the path to find the least number of transfer methods (experimental data, the Shanghai subwa