<DataGrid.Columns>
    <DataGridTemplateColumn>
        <DataGridTemplateColumn.Header>
            <CheckBox x:Name="checkAll" Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked"></CheckBox>
        </DataGridTemplateColumn.Header>
        <DataGridTemplateColumn.CellTemplate >
           <DataTemplate>
                <CheckBox IsChecked="{Binding IsSelected, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" HorizontalAlignment="Center" />
            </DataTemplate>
        </DataGridTemplateColumn.CellTemplate>
    </DataGridTemplateColumn>
    <DataGridTextColumn Header="#" Binding="{Binding userFriendlyId}" IsReadOnly="True"/>
    <DataGridTextColumn Header="Log Number" Binding="{Binding logNumber}" />
</DataGrid.Columns>

DataGrid.ItemsSource = samples;
DataGrid.Items.Refresh();

public class Sample
{
    public bool isSelected { get; set; }
    public int userFriendlyId { get; set; }
    public string logNumber { get; set; }
}