score:1

Accepted answer
yourtype selectedteam = dgteams.selecteditem as yourtype;
if (selectedteam != null)
{
    tbxteam.text = selectedteam.name;
    tbxbeliggenhet.text = selectedteam.beliggenhet;
    ...
}

score:1

private void showselectedteam(object sender, routedeventargs args)
{
    getdivisionnames();
    dgteams.selectionunit = datagridselectionunit.fullrow;
    dynamic selectedteam = dgteams.selecteditem;

    if (selectedteam == null) return;

    tbxteam.text = selectedteam.name.tostring();
    tbxbeliggenhet.text = selectedteam.beliggenhet.tostring();
    tbxarena.text = selectedteam.arena.tostring();
    cbxdivisions.text = selectedteam.division.tostring();
}

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