I'm a beginner programmer learning C#I coded two apps, which I named the Contact app and list app. What the first one does is printing out the input that was passed into the parameter. Here"s the code:

using System;
 
namespace contact
{
    public class Contact
    {
        private string fullName;
        private string phoneNumber;
 
        public string getName()
        {
                return fullName;
        }
 
        public void setName(string fullname)
        {
                this.fullName = fullname;
        }
 
        public string getPhonenumber()
        {
                return phoneNumber;
        }
 
        public void setPhoneNumber(string phoneNumber)
        {
                this.phoneNumber = phoneNumber;
        }
 
    }
 
    public class ContactManager
    {
            public static void Main()
            {
                Contact cnt = new Contact();
 
                cnt.setPhoneNumber("01234";
                cnt.setName("John Smith";
 
                Console.WriteLine("Name:" +  cnt.getName());
                Console.WriteLine("phone number:" + cnt.getPhonenumber());
          }
     }
}

The second one makes use of C# List to add and remove elements:

using System;
 
using System.Collections.Generic;
 
namespace ArrayListApplication
{
    class Program
    {
 
        
        public static void printMyList(List<int> arr)
        {
            for (int i = 0; i < arr.Count; i++)
            {
                Console.WriteLine(arr[i]);
            }
        }
 
        public static void Main(string[] args)
        {
           
            int[] myNumbers = new int[]  {10, 11, 12,13,14,15};
 
            // Its not possible to expand C# arrays. I had to convert to a flexible List
            // copying array into list
            List <int> mylist = new List<int>(myNumbers);
 
            printMyList(mylist); // printing array
           
            for (int i = 101; i <= 105; i++)
            {
                mylist.Add(i); // adding new elements
            }
 
            printMyList(mylist); // printing added elements
           
            // removing elements
            
            mylist.RemoveAt(1); // remove first element
            mylist.Remove(15); // remove 15
            mylist.RemoveAt(mylist.Count - 1); // remove last element
 
            printMyList(mylist); // printing remaining elements after removal
 
            Console.ReadKey();
        }
    }
}

Now, I tried combining these two programs so that I create a List of Contact with a loop that runs and asks the user
to enter a name, a phone number, and add all the info into the list. This is what I came up with but it's not working:

using System;
 
namespace contact
{
    public class Contact
    {
        private string fullName;
        private string phoneNumber;
 
        public string getName()
        {
                return fullName;
        }
 
        public void setName(string fullname)
        {
                this.fullName = fullname;
        }
 
        public string getPhonenumber()
        {
                return phoneNumber;
        }
 
        public void setPhoneNumber(string phoneNumber)
        {
                this.phoneNumber = phoneNumber;
        }
 
    }
 
    public class ContactManager
    {
            public static void Main()
            {

                 List<Contact> nameslist = new List<Contact>();

                  Console.Write("Enter your name";

                  string name = Console.ReadLine(); // I've stored it into a string now

                 nameslist.Add(name);

                 int i = 0;

                   while(name!="Quit" // I want the program to end if a user
                    enters "Quit".

                    
                   Console.WriteLine(i);i++;
                 }
}
}

I ended up getting this message from VS
Error 1 The best overloaded method match for
'System.Collections.Generic.List<ConsoleApplication4.contact.Contact>.Add(ConsoleApplication4.contact.Contact)'
has some invalid arguments c:\users\user\documents\visual studio
2010\Projects\ConsoleApplication4\ConsoleApplication4\Program.cs 49 17 ConsoleApplication4


Error 2 Argument 1: cannot convert from 'string' to
'ConsoleApplication4.contact.Contact' c:\users\user\documents\visual
studio 2010\Projects\ConsoleApplication4\ConsoleApplication4\Program.cs 49 31 ConsoleApplication4

Pls what do I do to get things right? I think I've really lost my track.

larisoft

Why are you converting from string to a public class....

Use

List<string> namelist = new List<string>();

add

using System.Collections.Generic;

Well done, bro.

The problem with your code is that you declared your list to accept only contact objects (List<Contact>, but you are trying to force a string object into it (namelist.add(name)).

Now, this will work;
List<Contact> nameslist = new List<Contact>();

Console.Write("Enter your name" );

string name = Console.ReadLine(); // I've stored it into a string now

//we are adding a contact object to a contacts list
Contact contact = new Contact();
contact.setFullName(name);
nameslist.Add(contact);

int i = 0;

while(name!="Quit" // I want the program to end if a user enters "Quit".

Console.WriteLine(i);
i++;

------OR---
//use a simple string list instead of a contact list

List<String> nameslist = new List<String>();

Console.Write("Enter your name" );

string name = Console.ReadLine(); // I've stored it into a string now

nameslist.Add(name);

int i = 0;

while(name!="Quit" // I want the program to end if a user enters "Quit".

Console.WriteLine(i);
i++;
}

Also note that you should use if(!name.Equals("Quit")) as opposed to (name!="Quit").

Keep it up.

Thanks larisoft and basbone. I will work on the suggestions and update the house.

mbatuku2:


int[] myNumbers = new int[] {10, 11, 12,13,14,15};

// Its not possible to expand C# arrays. I had to convert to a flexible List
// copying array into

You can use an ArrayList for a dynamic array

Try to combine the three class together .