public static AddNewCarForm GetInstances(CarForm parent)
{
if (instances != null)
{
return(instances);
}
if (instances == null)
{
return(instances = new AddNewCarForm(parent));
}
if (instances.IsDisposed)
{
return(instances = new AddNewCarForm(parent));
}
else
{
return(null);
}
}
private void btnAddCar_Click(object sender, EventArgs e)
{
AddNewCarForm addForm = AddNewCarForm.GetInstances(this);
addForm.Show();
}