// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002625/timespan-utcago

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        var timeSpan = new TimeSpan(1, 0, 0, 0);

​

        // C# Extension Method: TimeSpan - UtcAgo

        DateTime value = timeSpan.UtcAgo(); // return yesterday.

​

        Console.WriteLine(value.ToFullDateTimeString());

    }

}