和平广场附件的宾馆:请教C#几个问题

出现这样的错误"不可访问“Employee.name”，因为它受保护级别限制"
怎么样呢
using System;
public abstract class Employee
{
private string name;
private long idcard;
private double salary;
private double increase;
public Employee(string n,long i,double m)
{
name=n;
idcard=i;
salary=m;
}
public abstract string Name{get;set;}
public abstract double Salary{get;set;}
public abstract long ID{get;set;}
public abstract double Increase{get;set;}
public abstract void Raise(double perent);
public abstract void Print();
}
public class WorkEmp:Employee
{
public WorkEmp(string n,long i,double m):base(n,i,m){}
public override string Name
{
get{return name;}
set{name=value;}
}
public override double Salary
{
get{return salary;}
set{slary=value;}
}
public override long ID
{
get{return idcard;}
set{idcard=value;}
}
public override double Increase
{
get{return increase;}
set{increase=value;}
}
public override void Print()
{
Console.WriteLine("姓名:{0}",name);
Console.WriteLine("身份证号:{0}",idcard);
Console.WriteLine("基本工资:{0}",salary);
Console.WriteLine("增加工资额:{0}",increase);
}
public override void Raise(double percent)
{
Console.WriteLine("普通员工工资增加数额计算");
Increase=percent*salary;
}
}
public class App
{
public static void Main()
{
WorkEmp w=new WorkEmp("Mary",19980101,500);
w.Raise(0.05);
Console.WriteLine("该员工的工资情况为:");
w.Print();
}
}