Best Solution :Form cannot be both an MDI child and MDI parent. Parameter name: value in Visual Studio

For opening One or More Windows Form inside another Windows form, a property called "IsMdiContainer" and "MdiParent" is used in below given phasion:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace Education_Domain

{

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

            IsMdiContainer = true;

         

        } private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form3 tr = new Form3();
            tr.Show();
            tr.MdiParent = this;
      }
        }

Most of the times, this code works but users also complains that they get an error "Form cannot be both an MDI child and MDI parent. Parameter name: value". Screenshot of the error screen is given below :

If you are looking for the solution of this error, simply follow below given procedure:

 Solution of this Problem::

For solving the issue of this problem, Simply add "objectname.MdiConatiner=false;" before the code "objectname.MdiParent=this;". The complete code is given below:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Education_Domain
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            IsMdiContainer = true;
            
        }

        private void newToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form3 tr = new Form3();
            tr.IsMdiContainer = false; ---------solution code
            tr.MdiParent = this;
            tr.Show();
          }  
        }

That's all. Your problem will be fixed. If you are facing any other issue, let me know. I will fix that for you. 

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