Input Library Overview / FilePicker / Work with FilePicker / Selecting Multiple Files
Selecting Multiple Files

FilePicker for WPF allows users to select multiple files at run time, though this option is not selected by default. At run time, users can only select one file at a time by default – you can allow users to select multiple files by setting the Multiselect property to True, for example see the steps below.

To set the Multiselect property add Multiselect="True" to the <c1:C1FilePicker> tag so that it appears similar to the following:

XAML
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<c1:C1FilePicker Name="C1FilePicker1" Multiselect="True" HorizontalAlignment="Left" Margin="112,36,0,0" VerticalAlignment="Top" Width="161"/>