LiveCharts2有一个很棒的架构，可以轻松访问可视组件。因为我使用VB而不是C#，所以你可以在这里找到（original C# sample）的VB版本。

Private _TestSerie1 As ColumnSeries(Of Integer) = New ColumnSeries(Of Integer) With {
    .Values = New Integer() {2, 5, 4, 6, 8, 3, 2, 4, 6},
    .DataLabelsPaint = New SolidColorPaint(New SKColor(30, 30, 30)),
    .DataLabelsPosition = DataLabelsPosition.Top,
    .WhenPointMeasured = Sub(point As Object)                                    
                             If point.Visual IsNot Nothing Then
                                 Dim paint As SolidColorPaint = paints(point.Index Mod paints.Length)
                                 point.Visual.Fill = paint
                             End If
                         End Sub
}