ببخشید اشتباه از من بود
از خاصیت ItemsSource استفاده کن

 <DataGrid x:Name="grid1" HorizontalAlignment="Right" AutoGenerateColumns="False" CanUserSortColumns="False" CanUserAddRows="False" CanUserDeleteRows="False" CanUserResizeColumns="False" CanUserResizeRows="False" SelectionUnit="FullRow" FlowDirection="RightToLeft" Margin="0,0,16,264" Width="1250" Height="283" VerticalAlignment="Bottom">

                        <DataGrid.Columns>

                            <DataGridTextColumn Header="شماره" Binding="{Binding ID}" Width="-20">

                                <DataGridTextColumn.HeaderStyle>

                                    <Style TargetType="{x:Type DataGridColumnHeader}">

                                        <Setter Property="FontFamily" Value="B Yekan"/>

                                        <Setter Property="FontSize" Value="1"/>

                                        <Setter Property="FontWeight" Value="Bold"/>

                                        <Setter Property="HorizontalContentAlignment" Value="Center"/>

                                    </Style>

                                </DataGridTextColumn.HeaderStyle>

                                <DataGridTextColumn.ElementStyle>

                                    <Style TargetType="{x:Type TextBlock}">

                                        <Setter Property="Foreground" Value="White"/>

                                        <Setter Property="FontFamily" Value="B Yekan"/>

                                        <Setter Property="FontSize" Value="1"/>

                                        <Setter Property="HorizontalAlignment" Value="Center"/>

                                        <Setter Property="VerticalAlignment" Value="Center"/>

                                    </Style>

                                </DataGridTextColumn.ElementStyle>

                            </DataGridTextColumn>

                            

                        </DataGrid.Columns>                     </DataGrid>







var id=from d in db.VW_Item

         where d.deleted!=0

         select d;

var result = id.ToList(); grid1.ItemsSource = result;