using System;

using System.Collections;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        var crazyAdd2 = new CrazyAdd2

        {

            ["one"] = 1,

            ["two"] = 2,

        };

    }

    // Seriously!  Don't do this in production code! Ever!!!

    public class CrazyAdd2 : IDictionary<string, int>

    {

​

        public int this[string key]

        {

            get { throw new NotImplementedException(); }

            set { Console.WriteLine($"([{key}]={value})"); }

        }

​

        #region NotImplemented

        // lots of empty methods go here

​

        public bool ContainsKey(string key)

        {

            throw new NotImplementedException();

        }

​

        public void Add(string key, int value)

        {

            throw new NotImplementedException();

        }

​

        public bool Remove(string key)

        {

            throw new NotImplementedException();

        }

​

        public bool TryGetValue(string key, out int value)

        {

            throw new NotImplementedException();

        }

​

        public ICollection<string> Keys { get; }

        public ICollection<int> Values { get; }

​

​

        public IEnumerator<KeyValuePair<string, int>> GetEnumerator()

        {

            throw new NotImplementedException();

        }

​

        IEnumerator IEnumerable.GetEnumerator()

        {

            return GetEnumerator();

        }

​

        public void Add(KeyValuePair<string, int> item)

        {

            throw new NotImplementedException();

        }

​

        public void Clear()

        {

            throw new NotImplementedException();

        }

​

        public bool Contains(KeyValuePair<string, int> item)

        {

            throw new NotImplementedException();

        }

​

        public void CopyTo(KeyValuePair<string, int>[] array, int arrayIndex)

        {

            throw new NotImplementedException();

        }

​

        public bool Remove(KeyValuePair<string, int> item)

        {

            throw new NotImplementedException();

        }

​

        public int Count { get; }

        public bool IsReadOnly { get; }

​

        #endregion

    }

}