结构体

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TestStruct
{
    /// <summary>
    /// 声明结构
    /// </summary>
    public struct Name
    {
        private string fname, mname, lname;

        public Name(string first, string middle, string last)
        {
            this.fname = first;
            this.mname = middle;
            this.lname = last;
        }

        public string FirstName
        {
            get { return fname; }
            set { fname = value; }
        }

        public string MiddleName
        {
            get { return mname; }
            set { mname = value; }
        }

        public string LastName
        {
            get { return lname; }
            set { lname = value; }
        }

        /// <summary>
        /// 重写了ToString方法
        /// </summary>
        /// <returns>重写的值，复杂返回哈希值！</returns>
        public override string ToString()
        {
            
            return string.Format("{0}.{1}.{2}", fname, mname, lname);
        }

        public string Initials()
        {
            return string.Format("{0}.{1}.{2}", fname.Substring(0, 1).ToUpper(),
                                              mname.Substring(0, 1).ToUpper(),
                                              lname.Substring(0, 1).ToUpper());
        }

    }

    class Program
    {     
        static void Main(string[] args)
        {
            Name myName = new Name("Michael","Mason","McMillan");

            string fullName = myName.ToString();
            string inits = myName.Initials();

            Console.WriteLine(myName);
            Console.WriteLine(fullName);
            Console.WriteLine(inits);
        }
    }
}