Introduction: In order to show Dialog Modal Popup box from automatically opening on Page Load.
private void showPopHotSellingCourses()
{
ScriptManager.RegisterStartupScript(this, GetType(), "", "showmodalpopup();", true);
}
private void showPopHotSellingCourses()
{
ScriptManager.RegisterStartupScript(this, GetType(), "", "showmodalpopup();", true);
}