将DataGrid绑定到WPF中的元组集合时出现ReadOnly绑定错误

Question

任何想法，为什么当我尝试在DataGrid中编辑“文本”列时出现以下错误。

  

TwoWay或OneWayToSource绑定不适用于只读   属性“ Item2 datagrid ...

XAML

<DataGrid ItemsSource="{Binding Path=CustomInformation}" AutoGenerateColumns="False">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Value" 
                            IsReadOnly="False"
                            Binding="{Binding Item2}">
        </DataGridTextColumn>
    </DataGrid.Columns>
</DataGrid>

代码隐藏

  public ObservableCollection<Tuple<string, string>> CustomInformation { get; set; } =
     new ObservableCollection<Tuple<string, string>>();