using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//using System.Collections.Immutable;

namespace Pcb.Common
{
    [Serializable]
    public class KeySaveDictionary<TKey, TValue> : Dictionary<TKey, TValue>
    {
        public KeySaveDictionary() { }

        public new TValue this[TKey key]
        {
            get
            {
                TValue defaultValue = default(TValue);
                this.TryGetValue(key, out defaultValue);
                return defaultValue;
            }
            set
            {
                base[key] = value;
            }
        }
    }
}