Hello everyone welcome to my programming channel. I will show you how to make countdown timer.Let’s develop a simple count down using C sharp and windows form.You may also like :C# Create Countdown with TimerClick new project, open a new form and drop labels, text box, button and timer control to form from toolbox.How to make a Countdown Timer using C#.NETSet controls names as;label1 -> lbCountertextbox1 ->txtSecondsbutton1 -> btnStarttimer1 -> timer1Attach btsStart and timer1 to the program by double click and change program codes as below. public partial class Form1 : Form { int seconds; public Form1() { InitializeComponent(); } private void btnStart_Click(object sender, EventArgs e) { seconds = Convert.ToInt32(txtSeconds.Text); txtSeconds.Enabled = false; timer1.Start(); } private void timer1_Tick(object sender, EventArgs e) { lbCounter.Text = seconds--.ToString(); if(seconds < 0) { timer1.Stop(); txtSeconds.Enabled = true; } } }Result:How to make a Countdown Timer using C#.NET