title: Change variable in main form (Winform c#)
body: <p>I'm new to Visual studio and I created a Project with a Form1 and another Form called Form2. Form2 will be opened by this code:</p>
  
  <p><code>Form2 form = new Form2();
   form.Show();</code> </p>
  
  <p>When i click a Button in Form2 I want to change a variable in my Form1. Is there an easy way to do this? </p>