title: Cannot access a disposed object?
body: <p>I have a countdown Timer form - on the first form the user will enter the countdown time - warning times, end message, etc.  There are also two Radio buttons (Max/Min) and depending on which is selected they will open a new Max or Min form where the time will actually start to countdown.  It is working fine and counting down as I expect.  However, if I exit the Max or Min form and try to run again with new times I get the error.  The code is below - note the comment out ShowDialog(this); was something I tried - it let me close and open the new forms ok but it did not actually start the countdown.  UpdateLabels is the function that does the updating of Labels.</p>
  <pre><code>                bool Max = rbMax.Checked;
                  if (Max == true)
                  {
                      //_Max.ShowDialog(this);
                      _Max.Show();
  
                  }
                  else
                      //_Min.ShowDialog(this);
                      _Min.Show();
  
                  UpdateLabels();
              }
  </code></pre>
  <p>I also tried the following which I read online as a possible solution but it also did not work...</p>
  <pre><code>    private void Max_FormClosing(object sender, FormClosingEventArgs e)
      {
          this.Hide();
          this.Parent = null;
      }
  </code></pre>
  <p>Can anyone help me out - I can post the UpdateLabels function if needed.  I am pretty new to UI C# development so any help would be great.  Thanks.</p>