How can a web URL be included as a source for the media element in WPF?

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In order to include a web URL as a source for the media element in WPF, you need to:

1. Add the media element to your XAML code:

<MediaElement x:Name="mediaPlayer" />

1. Set the source property of the media element to the web URL:

mediaPlayer.Source = new Uri("https://example.com/media.mp4");

1. Optionally, you can handle any errors that may occur while loading the media file:

mediaPlayer.MediaFailed += (sender, args) =>
{
    MessageBox.Show("Failed to load media file");
};

1. Finally, you can play the media file using the Play method:

mediaPlayer.Play();

Note that the media file should be in a supported format and accessible from the web.