I have written the following DateDiff() function in C#. VB.NET users already had it using the Micrsoft.VisualBasic.dll assembly. Now you can use it without referencing this ‘ugly’ extra assembly.

using System; 

namespace PureSourceCode.System
{
public enum DateInterval
{
Year,
Month,
Weekday,
Day,
Hour,
Minute,
Second
}

public class DateTimeUtil
{
public static long DateDiff(DateInterval interval, DateTime date1, DateTime date2)
{
TimeSpan ts = date2 - date1;
switch (interval)
{
case DateInterval.Year:
return date2.Year - date1.Year;
case DateInterval.Month:
return (date2.Month - date1.Month) + (12 * (date2.Year - date1.Year));
case DateInterval.Weekday:
return Fix(ts.TotalDays) / 7;
case DateInterval.Day:
return Fix(ts.TotalDays);
case DateInterval.Hour:
return Fix(ts.TotalHours);
case DateInterval.Minute:
return Fix(ts.TotalMinutes);
default:
return Fix(ts.TotalSeconds);
}
}

private static long Fix(double Number)
{
if (Number >= 0)
{
return (long)Math.Floor(Number);
}
return (long)Math.Ceiling(Number);
}
}
}

By Enrico

My greatest passion is technology. I am interested in multiple fields and I have a lot of experience in software design and development. I started professional development when I was 6 years. Today I am a strong full-stack .NET developer (C#, Xamarin, Azure)

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