Program to create/write and set properties at runtime in C#

using System.Collections.Generic;

namespace ConsoleApplication1
{

    class DynamicProperties
    {
        Dictionary<string, object> properties = new Dictionary<string, object>();

        public object this[string name]
        {
            get
            {
                if (properties.ContainsKey(name))
                {
                    return properties[name];
                }
                return null;
            }
            set
            {
                properties[name] = value;
            }
        }

    }    

    class Program
    {
        static void Main(string[] args)
        {
            int year = 2015;
            int month = 3;

            var year_MnthProperty = new DynamicProperties();

            //set the property names with values
            switch (month)
            {
                case 1:
                    year_MnthProperty[string.Concat(GetMonthName(month), year)] = 100; break;
                case 2:
                    year_MnthProperty[string.Concat(GetMonthName(month), year)] = 200; break;
                case 3:
                    year_MnthProperty[string.Concat(GetMonthName(month), year)] = 300; break;
                case 4:
                    year_MnthProperty[string.Concat(GetMonthName(month), year)] = 400; break;
                case 5:
                    year_MnthProperty[string.Concat(GetMonthName(month), year)] = 500; break;
                case 6:
                    year_MnthProperty[string.Concat(GetMonthName(month), year)] = 600; break;
            }

            //read the property values
            var propertyName = string.Concat(GetMonthName(month), year);
            var propertyValues = year_MnthProperty[string.Concat(GetMonthName(month), year)];
        }

        private static string GetMonthName(int month)
        {
            string monthName = string.Empty;
            switch(month)
            {
                case 1:
                    monthName = "January"; break;
                case 2:
                    monthName = "February"; break;
                case 3:
                    monthName = "March"; break;
                case 4:
                    monthName = "April"; break;
                case 5:
                    monthName = "May"; break;
                case 6:
                    monthName = "June"; break;
            }
            return monthName;
        }
    }
}