private void tsmiRoleManager_Click(object sender, EventArgs e)
{
FrmRoleManager frm = FrmRoleManager.GetSingleton();
frm.MdiParent = this;
frm.Show();
frm.Activate();
}
public static FrmRoleManager GetSingleton()
{
if (frm == null || frm.IsDisposed)
// if (frm == null)
{
frm = new FrmRoleManager();
}
return(frm);
}