try base generic test, C#

try base generic test

//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

namespace Rextester
{
    // A custom exception that is thrown if a name or number is not found.

class NotFoundException : Exception {

/* Implement all of the Exception constructors. Notice that

the constructors simply execute the base class constructor.

Because NotFoundException adds nothing to Exception,

there is no need for any further actions. */

public NotFoundException() : base() { }

public NotFoundException(string message) : base(message) { }

public NotFoundException(string message, Exception innerException) :

base(message, innerException) { }

protected NotFoundException(

System.Runtime.Serialization.SerializationInfo info,

System.Runtime.Serialization.StreamingContext context) :

base(info, context) { }

}

// A base class that stores a name and phone number.

class PhoneNumber {

public PhoneNumber(string n, string num) {

Name = n;

Number = num;

}

public string Number { get; set; }

public string Name { get; set; }

}

// A class of phone numbers for friends.

class Friend : PhoneNumber {

public Friend(string n, string num, bool wk) :

base(n, num)

{

IsWorkNumber = wk;

}

public bool IsWorkNumber { get; private set; }

// ...

}

// A class of phone numbers for suppliers.

class Supplier : PhoneNumber {

public Supplier(string n, string num) :

base(n, num) { }

// ...

}

// Notice that this class does not inherit PhoneNumber.

class EmailFriend {

// ...

}

// PhoneList can manage any type of phone list

// as long as it is derived from PhoneNumber.

class PhoneList<T> where T : PhoneNumber {

T[] phList;

int end;

public PhoneList() {

phList = new T[10];

end = 0;

}

// Add an entry to the list.

public bool Add(T newEntry) {

if(end == 10) return false;

phList[end] = newEntry;

end++;

return true;

}

// Given a name, find and return the phone info.

public T FindByName(string name) {

for(int i=0; i<end; i++) {

// Name can be used because it is a member of

// PhoneNumber, which is the base class constraint.

if(phList[i].Name == name)

return phList[i];

}

// Name not in list.

throw new NotFoundException();

}

// Given a number, find and return the phone info.

public T FindByNumber(string number) {

for(int i=0; i<end; i++) {

// Number can be used because it is also a member of

// PhoneNumber, which is the base class constraint.

if(phList[i].Number == number)

return phList[i];

}

// Number not in list.

throw new NotFoundException();

}

// ...

}

// Demonstrate base class constraints.
    public class Program
    {
        public static void Main(string[] args)
        {
           // The following code is OK because Friend

// inherits PhoneNumber.

PhoneList<Friend> plist = new PhoneList<Friend>();

plist.Add(new Friend("Tom", "555-1234", true));

plist.Add(new Friend("Gary", "555-6756", true));

plist.Add(new Friend("Matt", "555-9254", false));

try {

// Find the number of a friend given a name.

Friend frnd = plist.FindByName("Gary");

Console.Write(frnd.Name + ": " + frnd.Number);

if(frnd.IsWorkNumber)

Console.WriteLine(" (work)");

else

Console.WriteLine();

} catch(NotFoundException) {

Console.WriteLine("Not Found");

}

Console.WriteLine();

// The following code is also OK because Supplier

// inherits PhoneNumber.

PhoneList<Supplier> plist2 = new PhoneList<Supplier>();

plist2.Add(new Supplier("Global Hardware", "555-8834"));

plist2.Add(new Supplier("Computer Warehouse", "555-9256"));

plist2.Add(new Supplier("NetworkCity", "555-2564"));

try {

// Find the name of a supplier given a number.

Supplier sp = plist2.FindByNumber("555-2564");

Console.WriteLine(sp.Name + ": " + sp.Number);

} catch(NotFoundException) {

Console.WriteLine("Not Found");

}

// The following declaration is invalid because EmailFriend

// does NOT inherit PhoneNumber.

// PhoneList<EmailFriend> plist3 =

// new PhoneList<EmailFriend>(); // Error!
        }
    }
}


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