DateTime.FromBinary() Method in C#

DateTime.FromBinary(Int64) Method is used to deserialize a 64-bit binary value and recreates an original serialized DateTime object.

Syntax: public static DateTime FromBinary (long dateData); 
Here, it takes a 64-bit signed integer that encodes the Kind property in a 2-bit field and the Ticks property in a 62-bit field.
Return Value: This method returns an object that is equivalent to the DateTime object that was serialized by the ToBinary() method.
Exception: This method will give ArgumentException if the dateData is less than MinValue or greater than MaxValue. 

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

csharp

// C# program to demonstrate the
// DateTime.FromBinary(Int64) Method
using System;
using System.Globalization;

class GFG {

    // Main Method
    public static void Main()
    {
        try {
            // creating object of DateTime
            DateTime date1 = new DateTime(2010, 1, 1,
                                           8, 0, 15);

            // getting a 64-bit signed integer
            // using ToBinary() method
            long binLocal = date1.ToBinary();

            // converting 64-bit into DateTime format
            // using FromBinary() method
            DateTime date2 = DateTime.FromBinary(binLocal);

            // Display the date1
            System.Console.WriteLine("DateTime before "
                     + "operation: {0:y} {0:dd}",date1);


            // Display the date2
            System.Console.WriteLine("\nDateTime after"
                  + " operation: {0:y} {0:dd}", date2);

        }

        catch (ArgumentOutOfRangeException e) {
            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

Output:

DateTime before operation: 2010 January 01

DateTime after operation: 2010 January 01

Example 2: For ArgumentOutOfRangeException

csharp

// C# program to demonstrate the
// DateTime.FromBinary() Method
using System;
using System.Globalization;

class GFG {

    // Main Method
    public static void Main()
    {
        try {

            // converting 64-bit into DateTime format
            // using FromBinary() method
            DateTime date = DateTime.FromBinary(-100000000000000000);

            // Display the date
            System.Console.WriteLine("\nDateTime: + {0:y} {0:dd} ", date);
        }

        catch (ArgumentException e)
        {
            Console.WriteLine("The resulting dateData"
                     + " is less than the MinValue ");

            Console.Write("Exception Thrown: ");
            Console.Write("{0}", e.GetType(), e.Message);
        }
    }
}

Output:

The resulting dateData is less than the MinValue 
Exception Thrown: System.ArgumentException

Reference:

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