如何将实体从Entity Framework绑定到DataGrid？

My XAML:

我的XAML：

<Window x:Class="Newsletter.UI.MessagesWindow"
        xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
        Title="MessagesWindow" Name="messagesWindow" Height="576" Width="1024" WindowStartupLocation="CenterScreen" Closed="MessagesWindowClosed">
    <Window.Resources>
        <Style TargetType="{x:Type Button}">
            <Setter Property="Width" Value="149"/>
            <Setter Property="Margin" Value="10"/>
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="75"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <StackPanel Grid.Row="0"  Orientation="Horizontal" HorizontalAlignment="Center">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="*"/>
                    <RowDefinition Height="*"/>
                </Grid.RowDefinitions>
                <Button Name="saveButton" Grid.Row="0" Content="Save"  Margin="10,10,10,5"/>
                <TextBox Name="searchTextBox" Grid.Row="1"  Margin="10,5,10,10"/>
            </Grid>
            <Button Name="recipientsButton" Content="RECIPIENTS" Click="RecipientsButtonClick" />
            <Button Name="createButton" Content="CREATE" Click="CreateButtonClick" />
            <Button Name="removeButton" Content="REMOVE" />
            <Button Name="editButton" Content="EDIT" />
            <Button Name="resendButton" Content="RESEND"/>
        </StackPanel>
        <DataGrid Name="gridMessages" Grid.Row="1"/>
    </Grid>
</Window>
<Window x:Class="Newslette