用于一次性存储不同类型的变量

public Struct 结构名{

成员；//字段

}

变量在运行期间只可以存储一个值，而字段可存储多个值；

namespace 结构练习
{
    public struct MyColor
    {
        public int _red;
        public int _green;
        public int _yellow;
    }
    public struct Person
    {
        public string _name;
        public  int _age;
        public Gender _gender;//枚举类型
    }
    public enum Gender
    {
        男,
        女

    }
    class Program
    {
        static void Main(string[] args)
        {
            MyColor color;
            color._red = 255;
            color._green = 0;
            color._yellow = 0;

            Person zsPreson;
            Person xlPerson;

            zsPreson._name = "张三";
            zsPreson._age = 17;
            zsPreson._gender = Gender.男;

            xlPerson._name = "小兰";
            xlPerson._age = 15;
            xlPerson._gender = Gender.女;
            Console.ReadKey();

        }
    }
}