Program:

The source code to get the date of yesterday using TimeSpan is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# program to get the date of yesterday using TimeSpan.

using System;

class Demo
{
    static void Main()
    {
        DateTime todayDate = DateTime.Now;

        DateTime yesterday;

        yesterday = todayDate - new TimeSpan(1, 0, 0, 0);

        Console.WriteLine("Yesterday: {0}/{1}/{2}", yesterday.Day, yesterday.Month,yesterday.Year);
    }
}

Output:

Yesterday: 12/9/2020
Press any key to continue . . .

Explanation:

Here, we created a class Demo that contains a static method Main(), First of all, here we found the today's date then minus the time-span for 1 day and get the yesterday's date and then print the date in the day, month, and year (DD/MM/YY) format on the console screen.