I have a problem binding List<List> to DataGrid columns in code-behind. Here is my list of lists:

private List<List<object>> matrix = new List<List<object>>()
     {
         new List<object>(){53, 2500, 3000, 3500, 4000, 4500, 5000},
         new List<object>(){2500, 1, 0, 0, 0, 0, 0},
         new List<object>(){3000, 0, 1, 0, 0, 0, 0},
         new List<object>(){3500, 0, 0, 1, 0, 0, 0},
         new List<object>(){4000, 0, 0, 0},
         new List<object>(){4500, 0, 0, 0, 0, 1, 0},
         new List<object>(){5000, 9, 7, 5, 4, 1, 1},
         new List<object>(){1, 0, 0, 0, 0, 0, 0},
         new List<object>(){2, 0, 0, 0, 0, 0, 0},
         new List<object>(){0, 0, 0, 0, 0, 0, 0}
     };

    public List<List<object>> Matrix
    {
        get { return matrix; }
        set
        {
            matrix = value;
            OnPropertyChanged(nameof(Matrix));
        }

I've done this in XAML like this:

<DataGrid ItemsSource="{Binding Matrix}" VerticalAlignment="Top" FontSize="14" x:Name="matrixDataGrid" Height="420" Width="630" MinRowHeight="20" AutoGenerateColumns="False" >
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding Path=[0], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[1], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[2], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[3], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[4], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[5], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[6], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[7], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[8], Mode=TwoWay}"/>
            <DataGridTextColumn Binding="{Binding Path=[9], Mode=TwoWay}"/>
        </DataGrid.Columns>
    </DataGrid>

And here is the result:

Nice thing about this is that there's no need for code behind or generating bindings programmatically.