title: c# winForms open forms inside mainform
body: <p>I have programmed c# application i will post screenshot. In this main form is 3 buttons which opens different forms. Now i decided to modify this application I want to Make one main form with strip menu which will open this forms. I used this code but i don't like or i'm doing something wrong. I don't like because there is child controls(minimize, maximize, close) in parent (please see second picture ):</p>
  
  <p><img src="https://i.stack.imgur.com/DIujY.jpg" alt="alt text"></p>
  
  <p>Please advice me something. Is MDI good for such job? Thanks!</p>
  
  <pre><code>Sell sell = new Sell();
  sell.MdiParent = this;
  sell.Dock = DockStyle.Fill;
  sell.Show();`
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/pEABN.jpg" alt="alt text"></p>
  
  <p>So my problem is that parent form is not filling when i open child form this is creen how to make that it parent form was filled with child form <img src="https://i.stack.imgur.com/JzRt8.jpg" alt="alt text"></p>