<DataGrid Grid.Row="0" Grid.RowSpan="2" Grid.Column="1" ItemsSource="{Binding SelectedData}">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Dev-Code" Binding="{Binding ageCode}" IsReadOnly="True" />
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <ComboBox x:Name="cmbDName" Margin="2" ItemsSource="{Binding ageName }" IsReadOnly="False"
                        SelectedItem="{Binding ageName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                        SelectedValuePath="ageNameId"/>
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
        </DataGrid.Columns>
    </DataGrid>