title: Checkbox does does not work in VB.Net form
body: <p>I have two <code>checkboxes</code> for two <code>groupboxes</code> to enable visibility or invisibility of each one at a time but somehow one is working(<code>chboNew</code>) the other one(<code>chboIssue</code>) doesn't! 
  here is the code I have written for it, any help would be appreciated:</p>
  
  <pre><code>Private Sub chboIssue_CheckStateChanged(sender As Object, e As EventArgs) Handles chboIssue.CheckStateChanged
      If chboIssue.Checked = True Then
          gbIssueSearch.Visible = True
          gbNewSearch.Visible = False
          chboNew.Checked = False
      ElseIf chboIssue.Checked = False Then
          gbIssueSearch.Visible = False
      End If
  End Sub
  
  Private Sub chboNew_CheckStateChanged(sender As Object, e As EventArgs) Handles chboNew.CheckStateChanged
      If chboNew.Checked = True Then
          gbNewSearch.Visible = True
          gbIssueSearch.Visible = False
          chboIssue.Checked = False
      ElseIf chboIssue.Checked = False Then
          gbNewSearch.Visible = False
      End If
  End Sub
  </code></pre>