private void ExecuteEditPieceCommand(object obj)
{
frmPieceDetail frm = new frmPieceDetail(PiecesPageViewModel?.SelectedPiece);
frm.Show();
}
private void ExecuteItemDoubleClick(object obj)
{
frmPieceDetail frm = new frmPieceDetail(SelectedPiece);
frm.Show();
}