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C# program to set last write time of file or directory in UTC format

In this C# program, we are going to learn how to set last write time in UTC format using C# program? To set this, we are using ‘SetLastWriteTimeUtc()’ of ‘File’ class.
Submitted by IncludeHelp, on November 03, 2017

Given a file and we have to set its last write time in UTC format using C# program.

File.SetLastWriteTimeUtc()

This is a method of "File class, it is used to set last write time in UTC format of a file/directory.

Syntax:

File.SetLastWriteTimeUtc(path);

Parameter(s):

1. path - Location of file or directory.

We can set following detail of last write time:

• Date
• Month
• Year
• Hour
• Minute
• Second
• AM/PM

Program

using System;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {
            DateTime dt1;
            
            Console.WriteLine("Time before set last write time in UTC:");
           
            dt1 = File. SetLastWriteTimeUtc("ABC.TXT");
            Console.WriteLine("\tLast write Time of file(ABC.TXT) : " + dt1);

            
            File. SetLastWriteTimeUtc("ABC.TXT", DateTime.Now);
           
            Console.WriteLine("Time After set last write time in UTC:");
           
            dt1 = File. SetLastWriteTime("ABC.TXT");
            Console.WriteLine("\tLast write Time of file(ABC.TXT) : " + dt1);

           
        }
    }
}

Output

Time before set last write time in UTC:
        Last write  Time of file(ABC.TXT) : 10/31/2017 4:25:36 PM
Time After set last write  time in UTC :
        Last write  Time of file(ABC.TXT) : 10/31/2017 4:37:29 PM

Note: In above program, we need to remember, when we use "File" class, System.IO namespace must be included in the program.

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