Как запустить SautinSoft.Document в Android/iOs

using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;
using Xamarin.Essentials;


using SautinSoft.Document;

namespace SautinSoft.Document.Xamarin.Example
{    
    public partial class MainPage : ContentPage
    {
        private string PathDocx { get; set; }
        static MainPage()
        {
            /// <summary>
            /// Convert DOCX, RTF, HTML to PDF (file to file) by Android/iOs.
            /// </summary>
            /// <remarks>
            /// Details: https://sautinsoft.com/products/document/help/net/getting-started/android.php
            /// </remarks>
           
        }

        public MainPage()
        {
            InitializeComponent();
        }

        private string ConvertDocument()
        {
            
            var dc = DocumentCore.Load(PathDocx, LoadOptions.DocxDefault);
            var filePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "Example.pdf");
           
            dc.Save(filePath);

            return filePath;
        }


        private async void Button_Choose(object sender, EventArgs e)
        {
            buttonchoose.IsEnabled = false;
            activity.IsRunning = true;

            var customFileType =
       new FilePickerFileType(new Dictionary DevicePlatform, IEnumerable
       {
            { DevicePlatform.iOS, new[] { "public.my.comic.extension" } }, // or general UTType values
            { DevicePlatform.Android, new[] { "*/*" } },
       });
            var options = new PickOptions
            {
                PickerTitle = "Please select any file",
                FileTypes = customFileType,
            };
            var result = await FilePicker.PickAsync(options);
            PathDocx = result.FullPath;
            
            activity.IsRunning = false;
            buttonchoose.IsEnabled = true;
        }

        private async void Button_Clicked(object sender, EventArgs e)
        {
            buttonconvert.IsEnabled = false;
            activity.IsRunning = true;

            try
            {
                var filePath = await Task.Run(() => ConvertDocument());
                await Launcher.OpenAsync(new OpenFileRequest(Path.GetFileName(filePath), new ReadOnlyFile(filePath)));
            }
            catch (Exception ex)
            {
                await DisplayAlert("Error", ex.Message, "Close");
            }

            activity.IsRunning = false;
            buttonconvert.IsEnabled = true;
        }
    }
}