请问此题如何将我输入的结果打印在屏幕上(语言-c#)

问题遇到的现象和发生背景
将对象初始化之后可以输入但输出结果不正确
问题相关代码
using System;

namespace _5
{
class Program
{
static void Main(string[] args)
{
Citizen s = new Citizen();
s.Input();
s.Print();
}
}
}

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

namespace _5
{
class Citizen
{
public string name;
public string Name
{
get
{
return name;
}
}
public string gender;
public string Gender
{
get
{
return gender;
}
}
public string age;
public string Age
{
get
{
return age;
}
}
public string birthplace;
public string BirthPlace
{
get
{
return birthplace;
}
}
public string id;
public string Id
{
get
{
return id;
}
}
public string familyaddress;
public string FamilyAddress
{
get
{
return familyaddress;
}
}
public Citizen()
{
name = "David";
gender = "Male";
age = "20";
birthplace = "Nanyang,Henan";
id = "1000";
familyaddress = "0000";
}
public void Input()
{
Console.WriteLine("Please input your name:");
string a = Console.ReadLine();
Console.WriteLine("Please input your gender:");
string b = Console.ReadLine();
Console.WriteLine("Please input your age:");
string c = Console.ReadLine();
Console.WriteLine("Please input your birthplace:");
string d = Console.ReadLine();
Console.WriteLine("Please input your id:");
string e = Console.ReadLine();
Console.WriteLine("Please input your familyaddress:");
string f = Console.ReadLine();
}
public void Print()
{
Console.WriteLine("Your name is:{0}","a");
Console.WriteLine();
Console.WriteLine("Your gender is:{0}","b");
Console.WriteLine();
Console.WriteLine("Your age is:{0}","c");
Console.WriteLine();
Console.WriteLine("Your birthplace is:{0}","d");
Console.WriteLine();
Console.WriteLine("Your id is:{0}","e");
Console.WriteLine();
Console.WriteLine("Your familyaddress is:{0}","f");
Console.WriteLine();
}
}
}
运行结果及报错内容
Please input your name:
1
Please input your gender:
2
Please input your age:
3
Please input your birthplace:
4
Please input your id:
5
Please input your familyaddress:
6
Your name is:a

Your gender is:b

Your age is:c

Your birthplace is:d

Your id is:e

Your familyaddress is:f
我想要达到的结果
在主程序中调用s.Print 输出s. Input 中输入的值

using System;

public class Citizen
{
    public string ID;
    
    public string Name;

    public string Gender;

    public string Age;

    public string Birthplace;

    public string Familyaddress;

    public Citizen() { }

    public void Input()
    {
        Console.WriteLine("Please input your id:");
        ID = Console.ReadLine();
        Console.WriteLine("Please input your name:");
        Name = Console.ReadLine();
        Console.WriteLine("Please input your gender:");
        Gender = Console.ReadLine();
        Console.WriteLine("Please input your age:");
        Age = Console.ReadLine();
        Console.WriteLine("Please input your birthplace:");
        Birthplace = Console.ReadLine();
        Console.WriteLine("Please input your familyaddress:");
        Familyaddress = Console.ReadLine();
    }

    public void Print()
    {
        string info = string.Format("ID:{0}\r\nName:{1}\r\nGender:{2}\r\nAge:{3}\r\nBirthplace:{4}\r\nFamilyaddress:{5}",
            ID, Name, Gender, Age, Birthplace, Familyaddress);
        Console.WriteLine(info);
    }
}

public class Program
{
    static void Main(string[] args)
    {
        Citizen citizen = new Citizen();
        citizen.Input();
        citizen.Print();
        Console.ReadLine();
    }
}

问题是这样的