TimeSpan - Ago

A TimeSpan extension method that substract the specified TimeSpan to the current DateTime.

Try it

public static void Main()
{
	var timeSpan = new TimeSpan(1, 0, 0, 0);

    // C# Extension Method: TimeSpan - Ago
	DateTime value = timeSpan.Ago(); // 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 DateTime.
    /// </summary>
    /// <param name="this">The @this to act on.</param>
    /// <returns>The current DateTime with the specified TimeSpan substracted from it.</returns>
    public static DateTime Ago(this TimeSpan @this)
    {
        return DateTime.Now.Subtract(@this);
    }
}