public Boolean AddLegendItem(String Text, DataChannel DataChannel)
{
var NewItem = new LegendItem(Text, DataChannel, item => { DataGraphLegend.Children.Remove(item); SomeThingChanged_private(); });
var Found = false;
foreach (var Item in DataGraphLegend.Children)
{
if (NewItem.Equals(Item as LegendItem))
Found = true;
}
if (!Found)
DataGraphLegend.Children.Add(NewItem);
SomeThingChanged_private();
return Found;
}