List vs ObservableCollection vs INotifyPropertyChanged in Silverlight

<UserControl
             xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:charting="clr-namespace:Microsoft.Windows.Controls.DataVisualization.Charting;assembly=Microsoft.Windows.Controls.DataVisualization"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" x:Class="SLListVsObservableCollection.Page"
    Width="Auto" Height="Auto" mc:Ignorable="d">
    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.RowDefinitions>
            <RowDefinition Height="51" />
            <RowDefinition Height="179" />
            <RowDefinition Height="300" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="333"/>
            <ColumnDefinition Width="325.5"/>
        	<ColumnDefinition Width="342"/>
        </Grid.ColumnDefinitions>
        
        <data:DataGrid x:Name="dgList" Grid.Row="1" Grid.Column="0" Margin="32,0,29,-6" />
        <charting:Chart x:Name="cList"  Grid.Row="2" Grid.Column="0" Title="Live Chart" Margin="32,0,29,99">
            <charting:Chart.Series>
                <charting:ColumnSeries DependentValueBinding="{Binding Path=Grade}"
                                    IndependentValueBinding="{Binding Path=Name}" />
            </charting:Chart.Series>
        </charting:Chart>
        
    	<data:DataGrid x:Name="dgOC" Grid.Row="1" Grid.Column="1" Margin="31,0,22,-6" />
    	<charting:Chart x:Name="cOC"  Grid.Row="2" Grid.Column="1" Title="Live Chart" Margin="31,0,22,99">
    		<charting:Chart.Series>
    			<charting:ColumnSeries DependentValueBinding="{Binding Path=Grade}"
    				IndependentValueBinding="{Binding Path=Name}" />
    		</charting:Chart.Series>
    	</charting:Chart>
        
    	<data:DataGrid x:Name="dgNPC" Grid.Row="1" Grid.Column="2" Margin="33,0,37,-6" />
    	<charting:Chart x:Name="cNPC"  Grid.Row="2" Grid.Column="2" Title="Live Chart" Margin="33,0,37,99">
    		<charting:Chart.Series>
    			<charting:ColumnSeries DependentValueBinding="{Binding Path=Grade}"
    				IndependentValueBinding="{Binding Path=Name}" />
    		</charting:Chart.Series>
    	</charting:Chart>

    	<TextBlock Margin="116,14,107,8" Text="List&lt;T&gt;" TextWrapping="Wrap" FontSize="20" FontWeight="Bold" d:LayoutOverrides="Height"/>
    	<TextBlock Margin="17,14,22,8" FontSize="20" FontWeight="Bold" Text="ObservableCollection&lt;T&gt;" TextWrapping="Wrap" d:LayoutOverrides="Height" Grid.Column="1"/>
    	<TextBlock Margin="33,14,22,8" FontSize="20" FontWeight="Bold" Text="INotifyPropertyChanged" TextWrapping="Wrap" Grid.Column="2" d:LayoutOverrides="Height"/>

    </Grid>
</UserControl>