how do I close a window that is contained in a grid in wpf

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C#

WPF

Hello experts. I'm still a newbie to wpf and working of transferring one of my projects from winforms to wpf. I want to add a window inside another window then close the hosted window using its controls and or events. The thing i want to achieve in wpf is achieved in windows forms using the following code.

Form2 f2;
        private void Form1_Load(object sender, EventArgs e)
        {
            f2 = new Form2();
            f2 .TopLevel = false;
            f2 .AutoScroll = true;
            this.Controls.Add(f2 );
            f2 .Show();
        }

closing Form2 from a button in form2
        private void button1_Click(object sender, EventArgs e)
        {
           this.Close();
        }

closing Form2 from a button in form2
        private void button1_Click(object sender, EventArgs e)
        {
           this.Controls.Remove(f2);
        }

I have managed to add a Window to a wpf grid(or content of the grid rather) using the following code

Window2 w2;
        private void Window1_Loaded(object sender, RoutedEventArgs e)
        {
            w2= new Window2 ();
            object childContent = w2.Content;
            w2.Content = null;
            grid1.Children.Add(childContent as UIElement);
        }

However i cannot seem to find any better way of clossing Window2 from either button1 on window2 or button1 on window one just like i did in winforms as demonstrated by the winform code above.

I do not want to clear the grid so as to get rid of f2 in window1.

i have tried the following

closing Window2 from a button in Window2

private void button1_Click(object sender, EventArgs e)
       {
          this.Close(); // not working
       }

closing Window1 from a button in Window1

private void button1_Click(object sender, EventArgs e)
        {
           grid1.Children.Remove(w2); // not working
           w2.Dispose(); // not working
        }

How can i achieve this. I would like to know how to open a window inside a wpf panel (eg grid) so that it can be closable from any of the windows just as i did in winforms. I have searched the internet but could not find any helpful link. Thank you for reading. Any form of help is appreciated.