I have a DataGrid and a string[][] dataSource array as a source data for this DataGrid. I use following code to set binding:

```
dataGrid.ItemsSource = dataSource;

for (int i = 0; i < columns; i++)
{
    dataGrid.Columns.Add(new DataGridTextColumn
    {                        
        Binding = new Binding(string.Format("[{0}]", i))
     });
}

```

How can I update an information in a cell of DataGrid when value in string[i][j] was changed?