protected internal static RoomForm Instance()
{
if (_instance == null)
{
_instance = new RoomForm();
}
return(_instance);
}
private void btnRoom_Click(object sender, EventArgs e)
{
if (!panel3.Controls.Contains(RoomForm.Instance()))
{
panel3.Controls.Add(RoomForm._instance);
RoomForm._instance.Dock = DockStyle.Fill;
RoomForm._instance.BringToFront();
RoomForm._instance.Visible = true;
}
RoomForm._instance.BringToFront();
RoomForm._instance.Visible = true;
}