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

namespace ConsoleApplication1
{   
        public struct Name
        {
            //字段
            private string fName, mName, lName;

            public Name(string fname, string mname, string lname)
            {
                fName = fname;
                mName = mname;
                lName = lname;
            }

            //属性
            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; }
            }
            //重写ToString()方法
            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), mName.Substring(0, 1), lName.Substring(0, 1)));

            }
        }
        class NameTest
        {
        static void Main()
        {
        Name myName = new Name("Michael", "Mason", "McMillan");
        string fullName, initsName;
        fullName = myName.ToString();
            initsName = myName.Initials();
            Console.WriteLine(fullName);
            Console.WriteLine(initsName);
            Console.Read();
            }
        }
    }

运行结果：

Michael Mason McMillan
MMM