I am getting a warning from the compiler about my code. I don’t know why because I have checked it in the property setter. If I check this in the constructor, the warning disappears, but then I have to write the same code twice, which is not good. Can someone explain to me how I should write this class? I want to know what is the right way to do this?

public class BankAccount
{
    private string _owner;
    private decimal _balance;

    public BankAccount(string owner, decimal balance)
    {
        // The compiler warning is gone if I check the values here,
        // but this leads to code duplication.
        this.Owner = owner;
        this.Balance = balance;
    }

    public string Owner
    {
        get
        {
            return _owner;
        }
        set
        {
            if (value is null)
            {
                throw new ArgumentNullException("Owner name you want to set is null");
            }
            _owner = value;
        }
    }

    public decimal Balance
    {
        get
        {
            return _balance;
        }
        set
        {
            if (value < 0)
            {
                throw new ArgumentOutOfRangeException("Balance should not be negative.");
            }
            _balance = value;
        }
    }

    public void Deposit(decimal amount)
    {
        if (amount < 1)
        {
            throw new ArgumentOutOfRangeException("Amount should not be negative");
        }
        this.Balance += amount;
    }

    public void Withdraw(decimal amount)
    {
        if (amount < 1)
        {
            throw new ArgumentOutOfRangeException("Amount should not be negative");
        }
        this.Balance -= amount;
    }
}