DateTime.FromFileTimeUtc() Method in C#

Last Updated : 02 Aug, 2021

DateTime.FromFileTimeUtc(Int64) Method is used to convert the specified Windows file time to an equivalent UTC time.

Syntax: public static DateTime FromFileTimeUtc (long fileTime);
Here, it takes a Windows file time expressed in ticks.
Return Value: This method returns an object that represents the UTC time equivalent of the date and time represented by the fileTime parameter.
Exception: This method wll give ArgumentOutOfRangeException if the fileTime is less than 0 or represents a time greater than MaxValue.

Below programs illustrate the use of DateTime.FromFileTimeUtc(Int64) Method:
Example 1:

csharp

// C# program to demonstrate the
// DateTime.FromFileTimeUtc(Int64) Method
using System;
using System.Globalization;
 
class GFG {
 
    // Main Method
    public static void Main()
    {
        try {
 
            // converting 2500000000000 file
            // time represented in ticks
            // into UTC Time format
            // using FromBinary() method
            DateTime date2 = DateTime.FromFileTimeUtc(2500000000000);
 
            // Display the date2
            System.Console.WriteLine("DateTime after"
                + " operation: {0:y} {0:dd}", date2);
                                     
        }
 
        catch (ArgumentOutOfRangeException e) {
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

Output:

DateTime after operation: 1601 January 03

Example 2: For ArgumentOutOfRangeException

csharp

// C# program to demonstrate the
// DateTime.FromFileTimeUtc(Int64) Method
using System;
using System.Globalization;
 
class GFG {
 
    // Main Method
    public static void Main()
    {
        try {
 
            // converting -1 file time
            // represented in ticks
            // into DateTime format
            // using FromFileTimeUtc() method
            DateTime date2 = DateTime.FromFileTimeUtc(-1);
 
            // Display the date2
            System.Console.WriteLine("\nDateTime after"
                  + " operation: {0:y} {0:dd}", date2);
                                     
        }
 
        catch (ArgumentOutOfRangeException e)
        {
            Console.WriteLine("fileTime is less than 0 ");
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

Output:

fileTime is less than 0 
Exception Thrown: System.ArgumentOutOfRangeException

Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.datetime.fromfiletimeutc?view=netframework-4.7.2

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