using System.Collections.Generic;
using System.Diagnostics;

public class DeleteList
{
    public List<string> objNames;

    public int Count { get { return objNames == null ? 0 : objNames.Count; } }

    public DeleteList() { }

    public bool Add(string name)
    {
        if (objNames == null)
            objNames = new List<string>();

        if (!objNames.Contains(name))
        {
            objNames.Add(name);
            return true;
        }
        return false;
    }

    public void Clear() {
        if (objNames != null) {
            objNames.Clear();
        }
    }

    public bool Contains(string name)
    {
        if (objNames != null && objNames.Contains(name))
        {
            return true;
        }
        return false;
    }

    public bool Remove(string name) {
        if (objNames != null && objNames.Contains(name)) {
            return objNames.Remove(name);
        }
        return false;
    }

    public void RemoveAt(int index) {
        if (objNames != null && index >= 0 && index < objNames.Count) {
            objNames.RemoveAt(index);
        }
    }
}