UWP DataTransferManager class DataRequest.Data.Property.Title is not reflecting in Outlook

Question

I wanted to share some data as mail from my UWP application, but I am unable to change the title (subject of the email), as I am able set title from code but not showing in outlook subject, outlook is using its default subject line as "Text from $SystemsUserName".

    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            DataTransferManager dataTransferManager = DataTransferManager.GetForCurrentView();
            dataTransferManager.DataRequested += DataTransferManager_DataRequested;
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            DataTransferManager.ShowShareUI();
        }
        void DataTransferManager_DataRequested(DataTransferManager sender, DataRequestedEventArgs args)
        {
            DataRequest request = args.Request;
            request.Data.Properties.Title = "My Custom Subject"; // This is showing as "Text from $SystemsUserName" in the Outlook mail.
            request.Data.SetText("This is body of email");

        }
    }

in xaml part of this page only one button is there which calls "Button_Click" this code shows outlook email window but does not show subject in the mail .

I read the documents on DataRequest but did not find anything regarding this issue. and also, there is no question regarding this anywhere.

Answer 1

Its Problem with Microsoft Outlook as it overwrites the Subject, and with Microsoft Mail it works fine. The code is right, the bug is in Microsoft Outlook.