How can I duplicate a class object using C#

Question

I have a class object that I use on my form to contain the data from my database named Item.cs. The issue I am having is when I am attempting to duplicate or make a copy of this object to another all the data is cleared. Once I execute the statement Item _newItem = new Item(); all the variables in the original item are cleared. Below is a stripped down version of the class. What was removed is the rest of the properties and the methods to interact with the database to make this a smaller post.

I am not sure what I have wrong that is causing this. I am using IDisposable so that I can use the using statement when inserting bulk data.

public class Item : IDisposable 
{
        private static int _itemID = 0;
        private static string _description = null;
        private static string _partNumber = null;
		
		public Item(Int32 ID = -1)
        {
            ClearVariables();
            if (ID >0)
            {
                SelectItem(ID);
            }
        }

        public void Dispose() 
        {
            Dispose(disposing: true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (disposed)
                return;

            if (disposing)
            {
                // Free any other managed objects here.
                //
            }
            disposed = true;
        }


        public int ItemID { get { return _itemID; } }

        public string Description { 
            get { return _description; } 
            set { _description = value; } 
        }

        public string PartNumber { 
            get { return _partNumber; } 
            set { _partNumber = value; } 
        }
}

Answer 1

As suggested, because the backing data for properties is static, all instances of the class have the same values. Change a value in one, it’s changed in all.

Answer 2

Perhaps the following might work for you.

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void RunSampleButton_Click(object sender, EventArgs e)
    {
        Person person = new Person() {FirstName = "Karen", LastName = "Payne"};
        Person copy = Person.DeepCopy(person);
        MessageBox.Show(copy.ToString());
    }
}

public class Person
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    
    public static Person DeepCopy(Person person) 
        => new () {FirstName = person.FirstName, LastName = person.LastName};

    public override string ToString() => $"{FirstName} {LastName}";
}