유용한 Extension Method 하나

출처 : http://www.codeproject.com/KB/cs/Threadsafe_formupdating.aspx

 public static class ExtensionMethod {
  public static TResult SafeInvoke<T, TResult>(this T isi, Func<T, TResult> call) where T : ISynchronizeInvoke {
   if(isi.InvokeRequired) {
    IAsyncResult result = isi.BeginInvoke(call, new object[] { isi });
    object endResult = isi.EndInvoke(result);
    return (TResult)endResult;
   } else
    return call(isi);
  }

  public static void SafeInvoke<T>(this T isi, Action<T> call) where T : ISynchronizeInvoke {
   if(isi.InvokeRequired)
    isi.BeginInvoke(call, new object[] { isi });
   else
    call(isi);
  }
 }