How to format the legend text in WPF Chart (SfChart)?

<chart:ChartLegend x:Name="Legend1" 
                        Header="Multiple Series"   
                        FontFamily="Bradley Hand ITC"
                        FontSize="20"
                        FontStretch="Expanded"
                        FontStyle="Italic"
                        FontWeight="ExtraBold"
                        Foreground="DarkGreen"/>

ChartLegend legend2 = new ChartLegend();
legend2.Header = "Multiple Series";
legend2.FontFamily = new FontFamily("Bradley Hand ITC");
legend2.FontSize = 20;
legend2.FontStretch = FontStretches.Expanded;
legend2.FontStyle = FontStyles.Italic;
legend2.FontWeight = FontWeights.ExtraBold;
legend2.Foreground = Brushes.DarkGreen;
this.chart1.Legend = legend2;