C#類中對字段、屬性、方法的介紹

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

namespace C字段屬性方法
{
    class Program
    {
        static void Main(string[] args)
        {
            School school1 = new School();
            school1.SchoolName="清華";//爲SchoolName屬性賦值
            school1.Schooladdress="圓明園路";//爲Schooladdress屬性賦值
            school1.SchoolArea(4000);//爲SchoolArea方法賦值,當值超出範圍時默認爲0
            Console.WriteLine(school1.SchoolName);
            Console.WriteLine(school1.Schooladdress);
            Console.WriteLine(school1.GetSchoolArea());
            Console.ReadKey();
        }
        class School
        {
            private string schoolname;//爲schoolname定義一個屬性SchoolName
            public string SchoolName
            {//判斷是否爲真
                set {
                    if (value == "清華大學")
                    {
                        schoolname = value;
                    }
                    else {
                        schoolname = "aaaaaaa";
                    }
                }
                get {//取值
                    return schoolname;
                }
            }
            private string schooladdress;
            // 爲schooladdress字段定義一個屬性
            public string Schooladdress
            {
                get { return schooladdress; }
                set { schooladdress = value; }
            }

            private double schoolarea;

            public void SchoolArea(double area) //建立方法爲字段schoolarea賦值set
            {
                if (area>10&&area<1000)
                {
                    schoolarea = area;
                }
            }
            public double GetSchoolArea() //返回字段schoolarea的值get
            {
                return schoolarea;
            }

            private void zhaosheng() {
           
            }
            private void kaixue() {
           
            }
        }
    }
}