// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002315/double-fromoadate

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        var arr = new double[]

        {

            39456,

            39482,

            39484,

            39493,

            39496,

            39497,

            39501,

            39506,

            39510,

            39513,

            39515,

            39521,

            36526,

            36557,

            39270 

        };

​

        foreach (double val in arr)

        {

            // C# Extension Method: Double - FromOADate

            DateTime oaDate = val.FromOADate();

​

            // Write to console.

            Console.WriteLine("{0} = {1}", val, oaDate.ToShortDateString());

        }

    }

}