Using Static Classes as Directive in C# 6

As we know that in C# 6 we can use static classes in using directive. To use static classes in using directive we use the following syntax:

Using static <StaticClassNameWithCompleteNameSpace>;

using System;
using static System.Console;
using static System.Convert;

namespace UsingStaticToPrintDay
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                WriteLine("Enter you choice from 1-7 and it will print corresponding day of a week");
                int choiceofday  = ToInt32(ReadLine());
                //Cast int to Enum
                string dayOfweek = Enum.GetName(typeof(DayOfWeek), choiceofday);
                WriteLine(dayOfweek);
            }
            catch (Exception ex)
            {
                WriteLine(ex.Message);
            }


        }
    }
}