3rdpartylibs/fastreports.wpf/FastReport.Forms.WPF/Misc/OpenFileDialog.cs

using System.IO;

namespace System.Windows.Forms
{
    public class OpenFileDialog : FileDialog
    {
        public bool Multiselect
        {
            get => (dialog as Microsoft.Win32.OpenFileDialog).Multiselect;
            set => (dialog as Microsoft.Win32.OpenFileDialog).Multiselect = value;
        }

        public Stream OpenFile() => File.OpenRead(FileName);

        public OpenFileDialog()
        {
            dialog = new Microsoft.Win32.OpenFileDialog();
        }
    }
}