using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var date = new DateTime(2016, 3, 23);

        Console.WriteLine(date.ToString("D"));

        var currentWeekday = (int)date.DayOfWeek;

        const int wednesday = 3;

        var offset = 0; 

        // if today is before wednesday, maxdate will be next wednesday

        if (currentWeekday < wednesday) {

            offset = wednesday - currentWeekday;

        }

        // if today is wednesday, add a whole week till next wednesday

        if(currentWeekday == wednesday) {

            offset = 7;

        }

        // if today is after wednesday, maxdate will be next wednesday

        if(currentWeekday > wednesday) {

            offset = wednesday - currentWeekday + 7;

        }

​

        var nextWednesday = date.AddDays(offset);

        Console.WriteLine(nextWednesday.ToString("D"));

    }

}