panels interfere with each other

[EntryTeam]

I've got this problem, i have 3 panels inside groupbox. all 3 panel are placed one over the other. when i make one of them visible, the other two SHOULD not be visible or interfere with the visible one.
The panels are started form menu strip.

But it's not working. Please, check my code, i really need advice:

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
 
namespace dugma1
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
            groupBox1.Visible=false;
            panel1.Visible=false;
            panel2.Visible=false;
            panel3.Visible=false;
        }
 
        void N1ToolStripMenuItemClick(object sender, EventArgs e)
        {
            groupBox1.Visible=true; panel1.Visible=true; 
 
            panel2.Visible=false; panel3.Visible=false;
        }
 
        void N2ToolStripMenuItemClick(object sender, EventArgs e)
        {
            groupBox1.Visible=true; panel2.Visible=true; 
 
            panel1.Visible=false; panel3.Visible=false;
        }
 
        void N3ToolStripMenuItemClick(object sender, EventArgs e)
        {
            groupBox1.Visible=true; panel3.Visible=true; 
 
            panel1.Visible=false; panel2.Visible=false;
        }
 
        void Button1Click(object sender, EventArgs e)
        {
            label1.Text="ODIN";
        }
 
        void Button3Click(object sender, EventArgs e)
        {
            label2.Text="DVA!!!";
        }
 
        void Button5Click(object sender, EventArgs e)
        {
            label3.Text="SPARTA!!!!!!";
        }
 
        void Button2Click(object sender, EventArgs e)
        {
            panel1.Visible=false;
 
            panel2.Visible=false;
            panel3.Visible=false; 
            groupBox1.Visible=false; 
        }
 
        void Button4Click(object sender, EventArgs e)
        {
            panel2.Visible=false; 
 
            panel1.Visible=false;
            panel3.Visible=false;
            groupBox1.Visible=false; 
        }
 
        void Button6Click(object sender, EventArgs e)
        {
            panel3.Visible=false; 
 
            panel1.Visible=false;
            panel2.Visible=false;
            groupBox1.Visible=false; 
        }
    }
}

[tlhintoq]

Tracking all the changes yourself in all those methods is a ton of work and way too easy to get confused. Not to mention a lot of work to modify if you add a fourth panel.

May I suggest you just react when any of the panels raise a .VisibleChanged event?

        void N1ToolStripMenuItemClick(object sender, EventArgs e)
        {
             panel1.Visible=true;
                         // The rest happens automatically from the VisibleChanged event
        }
 
 
 
 
private void Panel1_VisibleChange(object sender, eventargs e)
{
   Panel2.Visible = Panel3.Visible = False;
}
 
private void Panel2_VisibleChange(object sender, eventargs e)
{
   Panel1.Visible = Panel3.Visible = False;
}
 
private void Panel3_VisibleChange(object sender, eventargs e)
{
   Panel1.Visible = Panel2.Visible = False;
}