TimeSpan - UtcAgo

A TimeSpan extension method that substract the specified TimeSpan to the current UTC (Coordinated Universal Time)

Try it

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());
}

View Source
using System;

public static partial class Extensions
{
    /// <summary>
    ///     A TimeSpan extension method that substract the specified TimeSpan to the current UTC (Coordinated Universal
    ///     Time)
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <returns>The current UTC (Coordinated Universal Time) with the specified TimeSpan substracted from it.</returns>
    public static DateTime UtcAgo(this TimeSpan @this)
    {
        return DateTime.UtcNow.Subtract(@this);
    }
}