CoordinateSystemDataAdapterBase.SourceCoordinateSystem Property

void SetGeoMapGeoData() {
    imageLayer.Visible = false;

    Uri baseUri = new Uri(System.Reflection.Assembly.GetEntryAssembly().Location);
    Adapter.FileUri = new Uri(baseUri, geoMapGeoDataFile);
    Adapter.SourceCoordinateSystem = new GeoSourceCoordinateSystem();

    mapControl.CoordinateSystem = new GeoMapCoordinateSystem();
}

Private Sub SetGeoMapGeoData()
    imageLayer.Visible = False

    Dim baseUri As New Uri(System.Reflection.Assembly.GetEntryAssembly().Location)
    Adapter.FileUri = New Uri(baseUri, geoMapGeoDataFile)
    Adapter.SourceCoordinateSystem = New GeoSourceCoordinateSystem()

    mapControl.CoordinateSystem = New GeoMapCoordinateSystem()
End Sub