Refresh DateTime every second and display in Label in C# and VB.Net

Hi ramitaherwahd...,

You need to make use of Timer control OnTick event handler.

In every second the Timer executes its OnTick event which display the current time in Label control.

C#

private void OnTick(object sender, EventArgs e)
{
    lblTime.Text = DateTime.Now.ToString();
}

VB.Net

Private Sub OnTick(sender As Object, e As EventArgs) Handles Timer1.Tick
    lblTime.Text = DateTime.Now.ToString()
End Sub

For more details refer below article.

Implement Timer in Windows Forms using C# and VB.Net