public ToolTip(string toolTipText, Font font, StringFormat format, System.Drawing.Color backColor, System.Drawing.Color foreColor, System.Drawing.Color outlineColor, double outlineWeight) { if (string.IsNullOrWhiteSpace(toolTipText)) throw new ArgumentNullException(); this._toolTipText = toolTipText; this._font = font; this._format = format; this._backColor = backColor; this._foreColor = foreColor; this._outlineColoe = outlineColor; this._outlineWeight = outlineWeight; }