WriteOutput

void WriteOutput(string format,params object[] args) {
            WriteOutput(string.Format(format,args));
        }
        /// <summary>
        /// Writes output to a windows form using InvokeRequired property
        /// </summary>
        /// <param name="value">Data to output</param>
        void WriteOutput(object value) {
            string text = value == null ? string.Empty : value.ToString();
            text += Environment.NewLine;

            Action<string> writeAction = (s) => richTextBox1.AppendText(s);
            if(InvokeRequired)
                BeginInvoke(new Action<string>(writeAction),text);
            else
                writeAction(text);
        }