private void Button1_Click(object sender, System.EventArgs e)
{
var addDeptForm = new AddDepartmentForm();
addDeptForm.ShowDialog();
addDeptForm.Dispose();
UpdateTreeView();
}
private void addButton_Click(object sender, EventArgs e)
{
AddDepartmentForm form = new AddDepartmentForm();
form.ShowDialog();
}
private void AddDepartmentBtn_Click(object sender, EventArgs e)
{
var addDepartmentFrm = new AddDepartmentForm(this);
addDepartmentFrm.ShowDialog();
}