代码在UWP中工作正常，但在Android中失败。在我的Try... Catch中收到错误“Specified method is not supported.”。根据@JamesMontemagno，此代码应该可以工作。有关应用程序的更多细节，请参阅https://www.youtube.com/watch?v=YZ-Yw9CRxAY。代码如下所示：

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="SendEmail.MainPage">

    <StackLayout>
        <Frame BackgroundColor="#2196F3" Padding="24" CornerRadius="0">
            <Label Text="Email Sample" HorizontalTextAlignment="Center" TextColor="White" FontSize="36"/>
        </Frame>
        <Button x:Name="SendEmail" Text="Send" Clicked="SendEmail_Clicked"></Button>
    </StackLayout>

</ContentPage>

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

namespace SendEmail
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private async void SendEmail_Clicked(object sender, EventArgs e)
        {
            string body = "Test bowling message";
            string[] to = { "[email protected]"};
            //EmailAttachment attachment = new EmailAttachment(attach); 
            
            var message = new EmailMessage("Bowlers Scheduled for Week", body, to);
            //message.Attachments.Add(attachment);
            try
            {
                await Email.ComposeAsync(message);
            }
            catch (Exception ex)
            {
                //bool result = await DisplayAlert(ex.ToString(), "Send Email", "Yes", "No");
                string msg = ex.Message;
            }
        }
    }
}

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