title: Removing user controls from parent form
body: <p>I use this code to show user control on main form </p>
  
  <pre><code>    private void MainForm_Load(object sender, EventArgs e)
      {
          Sell sell = new Sell();
          sell.Dock = DockStyle.Fill;
          this.Controls.Add(sell);
      }
  </code></pre>
  
  <p>I want to remove this user control from main form but this code does not working</p>
  
  <pre><code>this.Controls.Remove(sell);
  </code></pre>
  
  <p>I tried <code>this.Parent.controls.Remove(sell);</code> but it does not work either.
  Please advise something...</p>