ChoroplethColorizer Class

    // Create colorizer for the MapLayer. 
    MapLayer.Colorizer = CreateColorizer();
private MapColorizer CreateColorizer() {
    // Create a Choropleth colorizer 
    ChoroplethColorizer colorizer = new ChoroplethColorizer();

    // Specify colors for the colorizer. 
    colorizer.ColorItems.AddRange(new ColorizerColorItem[] {
        new ColorizerColorItem(Color.FromArgb(0x5F, 0x8B, 0x95)), 
        new ColorizerColorItem(Color.FromArgb(0x79, 0x96, 0x89)),
        new ColorizerColorItem(Color.FromArgb(0xA2, 0xA8, 0x75)), 
        new ColorizerColorItem(Color.FromArgb(0xCE, 0xBB, 0x5F)),
        new ColorizerColorItem(Color.FromArgb(0xF2, 0xCB, 0x4E)),
        new ColorizerColorItem(Color.FromArgb(0xF1, 0xC1, 0x49)), 
        new ColorizerColorItem(Color.FromArgb(0xE5, 0xA8, 0x4D)),
        new ColorizerColorItem(Color.FromArgb(0xD6, 0x86, 0x4E)),
        new ColorizerColorItem(Color.FromArgb(0xC5, 0x64, 0x50)), 
        new ColorizerColorItem(Color.FromArgb(0xBA, 0x4D, 0x51))
    });

    // Specify range stops for the colorizer. 
    colorizer.RangeStops.AddRange(new double[] { 0, 3000, 10000, 18000, 28000, 
        44000, 82000, 185000, 1000000, 2500000, 15000000 });

    // Specify the attribute that provides data values for the colorizer. 
    colorizer.ValueProvider = new ShapeAttributeValueProvider() { AttributeName = "GDP_MD_EST" };

    return colorizer;
}

    ' Create colorizer for the MapLayer.
    MapLayer.Colorizer = CreateColorizer()
Private Function CreateColorizer() As MapColorizer
    ' Create a Choropleth colorizer
    Dim colorizer As New ChoroplethColorizer()

    ' Specify colors for the colorizer.
    colorizer.ColorItems.AddRange(New ColorizerColorItem() { _
        New ColorizerColorItem(Color.FromArgb(&H5F, &H8B, &H95)), _
        New ColorizerColorItem(Color.FromArgb(&H79, &H96, &H89)), _
        New ColorizerColorItem(Color.FromArgb(&HA2, &HA8, &H75)), _
        New ColorizerColorItem(Color.FromArgb(&HCE, &HBB, &H5F)), _
        New ColorizerColorItem(Color.FromArgb(&HF2, &HCB, &H4E)), _
        New ColorizerColorItem(Color.FromArgb(&HF1, &HC1, &H49)), _
        New ColorizerColorItem(Color.FromArgb(&HE5, &HA8, &H4D)), _
        New ColorizerColorItem(Color.FromArgb(&HD6, &H86, &H4E)), _
        New ColorizerColorItem(Color.FromArgb(&HC5, &H64, &H50)), _
        New ColorizerColorItem(Color.FromArgb(&HBA, &H4D, &H51)) _
    })

    ' Specify range stops for the colorizer.
    colorizer.RangeStops.AddRange(New Double() { 0, 3000, 10000, 18000, 28000, 44000, 82000, 185000, 1000000, 2500000, 15000000 })

    ' Specify the attribute that provides data values for the colorizer.
    colorizer.ValueProvider = New ShapeAttributeValueProvider() With {.AttributeName = "GDP_MD_EST"}

    Return colorizer
End Function