public Chart()
 {
     CreateFromProgId("Excel.Chart");
     _sinkHelper = new ChartEvents_SinkHelper(this);
 }
 public Chart(string progId)
 {
     CreateFromProgId(progId);
     _sinkHelper = new ChartEvents_SinkHelper(this);
 }
 public Chart(COMObject parentObject, object comProxy, Type comProxyType) : base(parentObject, comProxy, comProxyType)
 {
     _sinkHelper = new ChartEvents_SinkHelper(this);
 }