title: Parameter is not valid when draw text in label with custom font
body: <p>I have label with custom font and timer which change value in label. My app start minimzed. When I displaying the app sometimes exception is displayed and insted of text in label is red cross.</p>
  
  <p>here I try call async method for label text change</p>
  
  <pre><code>private void timer1_Tick(object sender, EventArgs e)
      {
          // create a delegate of MethodInvoker poiting to showTime function.
          MethodInvoker simpleDelegate = new MethodInvoker(showTime);
          // Calling showTime Async
          simpleDelegate.BeginInvoke(null, null);
      }
  </code></pre>
  
  <p>font loading</p>
  
  <pre><code>public Form1()
      {
          InitializeComponent();
  
          SystemEvents.SessionSwitch += new SessionSwitchEventHandler(SystemEvents_SessionSwitch); //event handler for windows lock
  
          File.WriteAllBytes(appPath + "\\font.ttf", Resources.font); //copy font from resources
  
          try
          {
              PrivateFontCollection pfc = new PrivateFontCollection();
              pfc.AddFontFile(appPath + @"/font.ttf");
              label1.Font = new Font(pfc.Families[0], 11, FontStyle.Bold);
          }
          catch
          {
              MessageBox.Show("Failed to load nice font." + "\r\n" + "Using standart font instead.", "Time app", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
          }
  
      }
  </code></pre>
  
  <p>here is method for label tet change</p>
  
  <pre><code>private void showTime()
      {
          label1.Text = time.ToString();
      }
  </code></pre>
  
  <p><em><strong></em>**<em>*</em>**<em></strong> Exception Text <strong></em>**<em>*</em>****</strong></p>
  
  <pre><code>System.ArgumentException: Parameter is not valid.
  at System.Drawing.FontFamily.GetName(Int32 language)
  at System.Drawing.FontFamily.get_Name()
  at System.Windows.Forms.Internal.WindowsFont.FromFont(Font font, WindowsFontQuality fontQuality)
  at System.Windows.Forms.Internal.WindowsGraphicsCacheManager.GetWindowsFont(Font font, WindowsFontQuality fontQuality)
  at System.Windows.Forms.TextRenderer.MeasureText(String text, Font font, Size proposedSize, TextFormatFlags flags)
  at System.Windows.Forms.Layout.LayoutUtils.MeasureTextCache.GetUnconstrainedSize(String text, Font font, TextFormatFlags flags)
  at System.Windows.Forms.Layout.LayoutUtils.MeasureTextCache.TextRequiresWordBreak(String text, Font font, Size size, TextFormatFlags flags)
  at System.Windows.Forms.Label.CreateTextFormatFlags(Size constrainingSize)
  at System.Windows.Forms.Label.CreateTextFormatFlags()
  at System.Windows.Forms.Label.OnPaint(PaintEventArgs e)
  at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
  at System.Windows.Forms.Control.WmPaint(Message&amp; m)
  at System.Windows.Forms.Control.WndProc(Message&amp; m)
  at System.Windows.Forms.Label.WndProc(Message&amp; m)
  at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message&amp; m)
  at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp; m)
  at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  </code></pre>
  
  <p>Question: how get rid of this exception when Im using custom font?</p>