c# 枚举多选

using System;
public class Test
{
　　TrainStyle trainStyle = TrainStyle.Null;
　　void Add(TrainStyle ts)
　　{
　　　　trainStyle |= ts;
　　}

　　void Remove(TrainStyle ts)
　　{
　　　　trainStyle &= (~ts);
　　}

　　bool Contain(TrainStyle ts)
　　{
　　　　return (trainStyle & ts)!= 0;
　　}

}
[Flags]
public enum TrainStyle
{
    Null = 0,
    G = 1,
    D = 2 << 1,
    T = 2 << 2,
    K = 2 << 3,
    Z = 2 << 4,
    C = 2 << 5,
    Other = 2 << 6
}