Question

Hi guys i’m trying to compare two dates, for some reason the following code will return false, if i specify 25/05/2012 (startdate) and 31/05/12 (end date).

This only happens if 25th is used as the start date, works fine if i use 26th.

 public bool IsValidDate(DateTime startDate, DateTime endDate)
    {
        return startDate < endDate && endDate > startDate;
    }

what could be wrong?

Answer 1

You must be mistaken something. For the given input you specified this code returns true:

class Program
{
    static void Main()
    {
        var startDate = new DateTime(2012, 5, 25);
        var endDate = new DateTime(2012, 5, 31);
        Console.WriteLine(IsValidDate(startDate, endDate));
    }

    public static bool IsValidDate(DateTime startDate, DateTime endDate)
    {
        return startDate < endDate && endDate > startDate;
    }
}

Prints true on the console.

Now of course repeating the exact same condition twice is meaningless. Stating the condition once is more than enough:

public bool IsValidDate(DateTime startDate, DateTime endDate)
{
    return startDate < endDate;
}