UI thread update sample code

a short sample code for Winform UI update

 1 delegate void ShowFontDataDelegate(EditorFontData fontData, RichTextBox sampleTextBox);
 2 
 3         private void UpdateFont(EditorFontData fontData, RichTextBox sampleTextBox)
 4         {
 5             if (sampleTextBox.InvokeRequired)
 6             {
 7                 readSampleTextBox.Invoke(new ShowFontDataDelegate(ShowFontData), new object[] { fontData, sampleTextBox });
 8             }
 9             else
             {
                 ShowFontData(fontData, sampleTextBox);
             }
         }
 
         private void ShowFontData(EditorFontData fontData, RichTextBox sampleTextBox)
         {
             if (fontData != null)
             {
                 Font newFont = new Font(fontData.Name, fontData.Size, (FontStyle)fontData.Style);
                 sampleTextBox.Font = newFont;
             }
         }