//issue book
private void btn_issue_Click(object sender, EventArgs e)
{
this.Hide();
IssueBook issue = new IssueBook();
//testIssueBook issue = new testIssueBook();
issue.Show();
}
private void button3_Click(object sender, EventArgs e)
{
Form f1;
f1 = new IssueBook();
f1.Show();
this.Hide();
}
