set custom font in webview

I want to set my own custom font in webview.

WebView Description = new WebView(this.Context);
            WebSettings settings = Description.Settings;
            settings.FixedFontFamily = "DIN-Condensed-Bold.ttf";

I have added my Font called DIN-Condensed-Bold.ttf in Assets/fonts folder, but I don`t see the effect.
Is it build action problem? How can I implement it?