Given any date, find the first date of the week in C#

Given a date like "9/23/2016", find the first date of the week. The below code will do so

using System;
using System.Globalization;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            var initialDate = Convert.ToDateTime("9/23/2016");

            var firstDayOfweek = initialDate.AddDays(CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek - initialDate.DayOfWeek);

            Console.ReadKey();
        }       

    }
}