StackPanel tSp = new StackPanel();
            DataGrid taxRateDataGrid = new DataGrid();
            DataGridTextColumn col0 = new DataGridTextColumn();
            DataGridTextColumn col1 = new DataGridTextColumn();
            DataGridCheckBoxColumn col2 = new DataGridCheckBoxColumn();


            taxRateDataGrid.Columns.Add(col0);
            taxRateDataGrid.Columns.Add(col1);
            taxRateDataGrid.Columns.Add(col2);

            col0.Binding = new Binding("Rate");
            col1.Binding = new Binding("Mark");
            col2.Binding = new Binding("isChecked");

            col0.Header = "Stawka";
            col1.Header = "Oznaczenie";
            col2.Header = "Status";



            taxRateDataGrid.Items.Add(new TaxRateFromDatabase { Rate = 1, Mark = "E", IsChecked = true});
            taxRateDataGrid.Items.Add(new TaxRateFromDatabase { Rate = 23, Mark = "F", IsChecked = false });