title: Change visibility of a control by clicking on a button
body: <p>I am working on a project in c#.I have a textbox in my form and a button below it.I want to change the visibility of my textbox by clicking on the button.for example, the textbox is hidden when the form loads.when user clicks on the button the textbox appears on the form.then user clicks on it again for the second time and the textbox hides again.how should i do it.please help me.</p>
  
  <p>Thanks for your kind helps.</p>