private void button4_Click(object sender, EventArgs e)
 {
     this.Hide();
     Views.Home_admin c = new Views.Home_admin();
     c.ShowDialog();
     this.Close();
 }
 private void homeToolStripMenuItem_Click(object sender, EventArgs e)
 {
     this.Hide();
     Views.Home_admin c = new Views.Home_admin();
     c.ShowDialog();
     this.Close();
 }