public void Close(ElementEvent e)
{
DivElement menu = Document.GetElementById <DivElement>("histogram");
DivElement closeBtn = Document.GetElementById <DivElement>("histogramClose");
menu.Style.Display = "none";
Window.RemoveEventListener("click", Close, true);
ImageElement image = Document.GetElementById <ImageElement>("graph");
image.RemoveEventListener("mousedown", MouseDown, false);
image.RemoveEventListener("mousemove", mousemove, false);
image.RemoveEventListener("mouseup", mouseup, false);
dropDown.RemoveEventListener("change", CurveStyleSelected, false);
dropDown.RemoveEventListener("click", IgnoreMe, true);
}