public void GenerateRegisterBodyCode(GeneratorExecutionContext context, StringBuilder sourceBuilder) { foreach (var file in context.AdditionalFiles) { var extension = Path.GetExtension(file.Path); if (extension.Equals(".ttf", StringComparison.InvariantCultureIgnoreCase) || extension.Equals(".otf", StringComparison.InvariantCultureIgnoreCase)) { var alias = context.GetMSBuildItemMetadata(file, "FontAlias"); var filename = Path.GetFileName(file.Path); var srcAlias = string.IsNullOrWhiteSpace(alias) ? "null" : $"\"{alias}\""; sourceBuilder.AppendLine( @"global::Xamarin.Forms.Internals.FontRegistrar.Register( new global::Xamarin.Forms.ExportFontAttribute(""" + filename + @""") { Alias = " + srcAlias + @" }, global::System.Reflection.Assembly.GetExecutingAssembly());"); } } }