=================================================EmployeeID.cs（學生編號類）

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Threading.Tasks;
namespaceConsoleApplication7
{
//作為鍵的型別必須要重寫GetHashCode()
publicclassEmployeeID:IEquatable<EmployeeID>
{
publicstringID{get;privateset;}
publicEmployeeID(strings)
{
ID=s;
}

publicoverrideboolEquals(objectobj)
{
if(obj==null)thrownewArgumentException("物件不能為空");
returnthis.Equals(objasEmployeeID);
}
publicoverrideintGetHashCode()
{
return1;
}
publicboolEquals(EmployeeIDother)
{
returnthis.ID==other.ID;
}
}
}

=================================================Student.cs（學生類）

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Threading.Tasks;
namespaceConsoleApplication7
{
publicclassStudent
{
publicstringName{get;privateset;}
publicEmployeeIDID{get;privateset;}
publicStudent(EmployeeIDid,stringname)
{
this.Name=name;
this.ID=id;
}
}
}

=================================================主程式

usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Threading.Tasks;
namespaceConsoleApplication7
{
classProgram
{
staticvoidMain(string[]args)
{
Dictionary<EmployeeID,Student>d=newDictionary<EmployeeID,Student>();
varID1=newEmployeeID("Z001");
varStu1=newStudent(ID1,"張飛");
d.Add(ID1,Stu1);
varID2=newEmployeeID("Z002");
varStu2=newStudent(ID2,"關羽");
d.Add(ID2,Stu2);
varID3=newEmployeeID("Z003");
varStu3=newStudent(ID3,"曹操");
d.Add(ID3,Stu3);
varID4=newEmployeeID("Z004");
varStu4=newStudent(ID4,"趙雲");
d.Add(ID4,Stu4);
varID5=newEmployeeID("Z005");
varStu5=newStudent(ID5,"馬超");
d.Add(ID5,Stu5);
while(true)
{
stringstr=Console.ReadLine();
if(str.ToLower()=="exit")return;
Students;
EmployeeIDei=null;
ei=newEmployeeID(str);
if(!d.TryGetValue(ei,outs))//判斷是否存在鍵對應的相關的值
{
Console.WriteLine("沒有找到該學生");
}
else
{
Console.WriteLine(d[ei].Name);
}
}

}
}
}

轉載於:https://blog.51cto.com/962410314/1548024