Teste.cs

StackLayout stkContainer = new StackLayout
{
  MinimumHeightRequest = 90,
  HorizontalOptions = LayoutOptions.FillAndExpand,
  Orientation = StackOrientation.Horizontal,
  TabIndex = index,
  StyleId = "stkContainer" + index
};

StackLayout stkIconeArquivo = new StackLayout
{
  WidthRequest = 85,
  HeightRequest = 85
};
Image iconeArquivo = new Image
{
  WidthRequest = 80,
  HeightRequest = 80
};
if (arquivo.UrlDownload.Contains(".pdf"))
{
  iconeArquivo.Source = "pdf80.png";
}
else if (arquivo.UrlDownload.Contains(".doc") || arquivo.UrlDownload.Contains(".docx"))
{
  iconeArquivo.Source = "doc80.png";
}
else
{
  iconeArquivo.Source = "file80.png";
}

Grid GridBotoes = new Grid
{
  HorizontalOptions = LayoutOptions.FillAndExpand,
};

ColumnDefinition coluna1 = new ColumnDefinition();
ColumnDefinition coluna2 = new ColumnDefinition();
RowDefinition linha1 = new RowDefinition
{
  Height = 40
};
GridBotoes.ColumnDefinitions.Add(coluna1);
GridBotoes.ColumnDefinitions.Add(coluna2);
GridBotoes.RowDefinitions.Add(linha1);

StackLayout stkInformacoesArquivo = new StackLayout
{
  HorizontalOptions = LayoutOptions.FillAndExpand,
  Orientation = StackOrientation.Vertical,
  TabIndex = index,
  StyleId = "stkInformacoesArquivo" + index
};
stkInformacoesArquivo.StyleId = "stkInformacoesArquivo" + index;

StackLayout stkBotoes = new StackLayout
{
  Orientation = StackOrientation.Horizontal,
  HorizontalOptions = LayoutOptions.FillAndExpand,
  Margin = new Thickness(0, -7, 0, 0),
  HeightRequest = 50
};

Label lblNomeArquivo = new Label
{
  Text = arquivo.NomeArquivoOriginal,
  HorizontalOptions = LayoutOptions.FillAndExpand,
  LineBreakMode = LineBreakMode.TailTruncation
};
Label lblTipoArquivo = new Label
{
  Text = arquivo.NomeTipoDocumento,
  HorizontalOptions = LayoutOptions.FillAndExpand,
  LineBreakMode = LineBreakMode.TailTruncation,
  Margin = new Thickness(0, -7, 0, 0)
};
Button btnApagar = new Button
{
  HorizontalOptions = LayoutOptions.FillAndExpand,
  TabIndex = index,
  BackgroundColor = Color.Red,
  TextColor = Color.White,
  IsEnabled = false,
  Text = "Apagar",
  HeightRequest = 35
};
btnApagar.SetBinding(Button.CommandProperty, new Binding("ApagaArquivo", 0));
btnApagar.CommandParameter = arquivo;

Button btnDownload = new Button
{
  HorizontalOptions = LayoutOptions.FillAndExpand,
  TabIndex = index,
  HeightRequest = 25
};
if (arquivo.JaBaixou)
{
  btnDownload.Text = "Abrir";
  btnDownload.BackgroundColor = Color.FromHex("#4C912C");
  btnDownload.TextColor = Color.White;
  btnDownload.SetBinding(Button.CommandProperty, new Binding("AbreArquivo", 0));
  btnDownload.CommandParameter = arquivo;
  btnApagar.IsEnabled = true;
}
else
{
  btnDownload.Text = "Baixar";
  btnDownload.BackgroundColor = Color.FromHex("#1B1F5F");
  btnDownload.TextColor = Color.White;
  btnDownload.SetBinding(Button.CommandProperty, new Binding("BaixaArquivo", 0));
  btnDownload.CommandParameter = arquivo;
}
Grid.SetColumn(btnDownload, 0);
Grid.SetColumn(btnApagar, 1);
GridBotoes.Children.Add(btnDownload);
GridBotoes.Children.Add(btnApagar);
stkBotoes.Children.Add(GridBotoes);
stkInformacoesArquivo.Children.Add(lblNomeArquivo);
stkInformacoesArquivo.Children.Add(lblTipoArquivo);
stkInformacoesArquivo.Children.Add(stkBotoes);
stkIconeArquivo.Children.Add(iconeArquivo);
stkContainer.Children.Add(stkIconeArquivo);
stkContainer.Children.Add(stkInformacoesArquivo);
BoxView linhaSeparadora = new BoxView
{
  HorizontalOptions = LayoutOptions.FillAndExpand,
  BackgroundColor = Color.Black,
  Color = Color.Black,
  HeightRequest = 1
};
stkArquivosRecebidos.Children.Add(stkContainer);
stkArquivosRecebidos.Children.Add(linhaSeparadora);