private void addCategoryButton_Click(object sender, EventArgs e)
{
CategoryUi category1 = new CategoryUi();
category1.MdiParent = this;
category1.Hide();
category1.Show();
}
private void addCategotyButton_Click(object sender, EventArgs e)
{
CategoryUi category1 = new CategoryUi();
category1.Show();
}
private void addCategoryToolStripMenuItem_Click(object sender, EventArgs e)
{
CategoryUi category1 = new CategoryUi();
category1.Show();
}