How to Assign Variable values to HtmlWebViewSource.html

var htmlSource = new HtmlWebViewSource();

        htmlSource.Html = @" < html >
                            < body >
                            < h1 > Xamarin.Forms </ h1 >
                            < p > The CSS and image are loaded from local files!</ p >

                               < img src = 'XamarinLogo.png' />

                                < p >< a href = ""Paymepage.html"" > next page </ a ></ p >

                                       </ body >

                                       </ html > ";