Утилизировать окно WPF

У меня есть окно WPF, которое я показываю с помощью Window.Show(). Когда я нажимаю X, форма закрывается. Но он все еще находится в памяти, и GC никогда не приходит и не очищает его. Также у меня нет ссылок/дескрипторов.

Кто-нибудь знает, что может заставить его остаться в памяти?

Спасибо!

Обновление: я использую следующий код для создания окна:

   Public Sub OpenPageWindow(ByVal nick As String)
        Dim found As Boolean

        For Each pw As PageWindow In Application.Current.Windows.OfType(Of PageWindow)()
            If Not pw.Tag Is Nothing Then
                If pw.Tag.ToString() = nick Then
                    If pw.IsVisible = False Then
                        pw.Show()
                    End If
                    Exit Sub
                End If
            End If
        Next

        If found = False Then
            Dim p As New PageWindow With {.Name = "pw" & nick, .Tag = nick, _
                                          .Title = "Chatting with " & nick, .ShowActivated = False}
            p.Show()
        End If
    End Sub

и следующий код для самого окна:

Public Class PageWindow
    Implements System.IDisposable

    Public UserPressedExit As Boolean
    Dim MainWin As MainWindow

    Private _IsBuddy As Boolean
    Private _IsBlocked As Boolean
    Private _IsOnline As Boolean

    Public Property FirstOpen As Boolean

    Public Property IsOnline As Boolean
        Get
            Return _IsOnline
        End Get
        Set(ByVal value As Boolean)
            If _IsOnline <> value Then
                _IsOnline = value
            End If
        End Set
    End Property

    Public Property IsBuddy As Boolean
        Get
            Return _IsBuddy
        End Get
        Set(ByVal value As Boolean)
            If _IsBuddy <> value Then
                _IsBuddy = value
                'If value Then
                '    btnAddBuddy.IsEnabled = False
                '    iDeleteBuddy.IsEnabled = True
                'Else
                '    btnAddBuddy.IsEnabled = True
                '    iDeleteBuddy.IsEnabled = False
                'End If
            End If
        End Set
    End Property

    Private Sub Window_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
        Try
            MainWin = CType(Application.Current.Windows(0), MainWindow)
        Catch ex As Exception
            txtChat.AppendText("ERROR: " & ex.Message.ToString() & Environment.NewLine)
        End Try
    End Sub

    Private Sub Window_Closed(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Me.Dispose()
    End Sub

    Private Sub txtTitle_PreviewMouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Input.MouseButtonEventArgs)
        Me.DragMove()
    End Sub

    Private Sub pbMin_PreviewMouseUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.MouseButtonEventArgs)
        WindowState = Windows.WindowState.Minimized
    End Sub

    Private Sub pbClose_PreviewMouseUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.MouseButtonEventArgs)
        UserPressedExit = True
        txtChat.Clear()
        Me.Close()
    End Sub

    Private Sub txtSend_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Input.KeyEventArgs)
        If e.Key = Key.Enter Then
            btnSend_Click(Nothing, Nothing)
        End If
    End Sub

    Private Sub btnSend_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
        If String.IsNullOrWhiteSpace(txtSend.Text) Then
            MessageBox.Show("Empty Message.")
            txtSend.Text = ""
        Else
            Send(txtSend.Text)

            txtSend.Text = ""
        End If
    End Sub

    Public Sub Page(ByVal message As String)
        If String.IsNullOrEmpty(message) = False Then
            If MainWin.Settings.ShowPageTimestamp Then
                txtChat.AppendText(Me.Tag.ToString() & " (" & Format(Date.Now, "HH:mm:ss") & "): " & message & Environment.NewLine)
            Else
                txtChat.AppendText(Me.Tag.ToString() & ": " & message & Environment.NewLine)
            End If

            If Me.IsFocused = False Then

            End If
        End If
    End Sub

    Private Sub Send(ByVal text As String)
        'work on 389 event
        MainWin.Send("PAGE " + Me.Tag.ToString + " " + text)

        If MainWin.Settings.ShowPageTimestamp Then
            txtChat.AppendText(MainWin.Settings.Nick & ": " & text & Environment.NewLine)
        Else
            txtChat.AppendText(MainWin.Settings.Nick & " (" & Format(Date.Now, "HH:mm:ss") & "): " & text & Environment.NewLine)
        End If
    End Sub

#Region "IDisposable Support"
    Private disposed As Boolean ' To detect redundant calls

    ' This code added by Visual Basic to correctly implement the disposable pattern.
    Public Sub Dispose() Implements IDisposable.Dispose
        ' Do not change this code.  Put cleanup code in Dispose(ByVal disposing As Boolean) above.
        Dispose(True)
        GC.SuppressFinalize(Me)
    End Sub

    Protected Overridable Sub Dispose(ByVal disposing As Boolean)
        If Not Me.disposed Then
            If disposing Then
                'dispose managed state (managed objects).
                RemoveHandler Me.Loaded, AddressOf Window_Loaded
                RemoveHandler txtTitle.PreviewMouseDown, AddressOf txtTitle_PreviewMouseDown
                RemoveHandler pbMin.PreviewMouseUp, AddressOf pbMin_PreviewMouseUp
                RemoveHandler pbClose.PreviewMouseUp, AddressOf pbClose_PreviewMouseUp
                RemoveHandler txtSend.KeyUp, AddressOf txtSend_KeyUp
                RemoveHandler btnSend.Click, AddressOf btnSend_Click
                RemoveHandler Me.Closed, AddressOf Window_Closed

                BindingOperations.ClearBinding(txtTitle, TextBlock.TextProperty)

                Me.Icon = Nothing
                ibBackground = Nothing
                'iDeleteBuddy = Nothing
                'btnAddBuddy = Nothing
                'iBlockUser = Nothing
                pbMin = Nothing
                pbClose = Nothing
                MainWin = Nothing

                Me.Resources.Clear()

                GC.Collect()
            End If
        End If
        Me.disposed = True
    End Sub

    Protected Overrides Sub Finalize()
        ' Do not change this code.  Put cleanup code in Dispose(ByVal disposing As Boolean) above.
        Dispose(False)
        MyBase.Finalize()
    End Sub
#End Region
End Class

Затем следующий код для XAML:

<Window x:Class="PageWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="PageWindow" Height="300" Width="400"
        Icon="Images\R2.ico" WindowStyle="None" ResizeMode="NoResize"
        WindowStartupLocation="Manual" Loaded="Window_Loaded"
        BorderThickness="2" BorderBrush="#FFAE28"
        Closed="Window_Closed">
    <Window.Resources>
        <Style x:Key="sRenegadeButton" TargetType="Button">
            <Setter Property="FontFamily" Value="Franklin Gothic Medium" />
            <Setter Property="FontSize" Value="12px" />
            <Setter Property="FontWeight" Value="Bold" />
            <Setter Property="Background" Value="Transparent" />
            <Setter Property="Foreground" Value="#FFAE28" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Name="Border" BorderBrush="#FFAE28" BorderThickness="1" CornerRadius="3" 
                                Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                            <Border Name="innerborder" BorderBrush="#FFAE28" BorderThickness="1" CornerRadius="3" 
                                    Background="{TemplateBinding Background}" SnapsToDevicePixels="True" Margin="1">
                                <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Name="content" />
                            </Border>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="Border" Property="BorderBrush" Value="#FFD528" />
                                <Setter TargetName="innerborder" Property="BorderBrush" Value="#FFD528" />
                                <Setter Property="Background" Value="#28FFAE28" />
                                <Setter Property="Foreground" Value="#FFD528" />
                            </Trigger>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter Property="Background" Value="#28FFAE28" />
                                <Setter TargetName="content" Property="RenderTransform" >
                                    <Setter.Value>
                                        <TranslateTransform Y="1.0" />
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter TargetName="Border" Property="BorderBrush" Value="#80E6A023" />
                                <Setter TargetName="innerborder" Property="BorderBrush" Value="#80E6A023" />
                                <Setter Property="Foreground" Value="#8CFFD528" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="sRenegadeTextBox" TargetType="TextBox">
            <Setter Property="FontFamily" Value="Franklin Gothic Medium" />
            <Setter Property="FontSize" Value="12px" />
            <Setter Property="Foreground" Value="#FFD528" />
            <Setter Property="Background" Value="#28FFAE28" />
            <Setter Property="BorderBrush" Value="#FFAE28" />
            <Setter Property="CaretBrush" Value="#FFAE28" />
            <Setter Property="SelectionBrush" Value="#FFD528" />
            <Setter Property="BorderThickness" Value="1" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="TextBox">
                        <Border Name="Bd" BorderThickness="{TemplateBinding BorderThickness}" 
                                BorderBrush="{TemplateBinding BorderBrush}" 
                                Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
                            <ScrollViewer Name="PART_ContentHost" Background="{TemplateBinding Background}" 
                                          SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Property="Foreground" Value="#8CFFD528" />
                                <Setter Property="Background" Value="#1EFFAE28" />
                                <Setter Property="BorderBrush" Value="#80E6A023" />
                                <Setter TargetName="PART_ContentHost" Property="Background" Value="#1EFFAE28"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="21" />
            <RowDefinition Height="32" />
            <RowDefinition Height="*" />
            <RowDefinition Height="27" />
        </Grid.RowDefinitions>

        <Grid.Background>
            <ImageBrush x:Name="ibBackground"  ImageSource="Images\page_back.gif" />
        </Grid.Background>

        <Border Grid.Row="0" BorderBrush="#FFAE28" BorderThickness="0,0,0,2" 
                SnapsToDevicePixels="True" />

        <Grid Name="gTitleBar" Grid.Row="0" Background="#32FFAE28">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="30" />
                <ColumnDefinition Width="32" />
            </Grid.ColumnDefinitions>

            <TextBlock Name="txtTitle" Grid.Column="0" Text="{Binding Title,RelativeSource={RelativeSource FindAncestor,AncestorType=Window}}"
                       HorizontalAlignment="Stretch" VerticalAlignment="Center"
                       TextAlignment="Left" Margin="4,0,1,0" 
                       PreviewMouseDown="txtTitle_PreviewMouseDown"
                       Foreground="#FED528" FontFamily="Franklin Gothic Medium" />

            <Image Name="pbMin" Grid.Column="1" Width="28" Height="15" 
                    HorizontalAlignment="Center" VerticalAlignment="Center"
                    PreviewMouseUp="pbMin_PreviewMouseUp" Stretch="None">
                <Image.Style>
                    <Style TargetType="{x:Type Image}">
                        <Setter Property="Source" Value="Images\min.png" />

                        <Style.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Source" Value="Images\min_o.png" />
                            </Trigger>
                        </Style.Triggers>
                    </Style>
                </Image.Style>
            </Image>
            <Image Name="pbClose" Grid.Column="2" Width="28" Height="15" 
                    HorizontalAlignment="Left" VerticalAlignment="Center"
                    PreviewMouseUp="pbClose_PreviewMouseUp" Stretch="None">
                <Image.Style>
                    <Style TargetType="{x:Type Image}">
                        <Setter Property="Source" Value="Images\close2.png" />

                        <Style.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Source" Value="Images\close2_o.png" />
                            </Trigger>
                        </Style.Triggers>
                    </Style>
                </Image.Style>
            </Image>
        </Grid>

        <Grid Grid.Row="1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="25" />
                <ColumnDefinition Width="25" />
                <ColumnDefinition Width="25" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>

            <!--<Button Name="btnAddBuddy" Grid.Column="1" Margin="0,2,0,0">
                <Button.Style>
                    <Style TargetType="{x:Type Button}">
                        <Setter Property="Background" Value="Transparent" />
                        <Setter Property="Template">
                            <Setter.Value>
                                <ControlTemplate TargetType="{x:Type Button}">
                                    <Grid>
                                        <Border Name="Border" BorderBrush="Transparent" BorderThickness="1" CornerRadius="3" 
                                            Background="{TemplateBinding Background}" SnapsToDevicePixels="True">

                                        </Border>
                                        <Image Name="iAddBuddy" Margin="1" Source="Images\Add Buddy 32x36.png" />
                                        <Image Name="iAddBuddyDissabled" Margin="1" Source="Images\Add Buddy 32x36.png" Visibility="Hidden" />
                                    </Grid>

                                    <ControlTemplate.Triggers>
                                        <Trigger Property="IsMouseOver" Value="True">
                                            <Setter TargetName="Border" Property="BorderBrush" Value="#FFD528" />
                                        </Trigger>
                                        <Trigger Property="IsPressed" Value="True">
                                            <Setter Property="Background" Value="#FFD528" />
                                        </Trigger>
                                        <Trigger Property="IsEnabled" Value="False">
                                            <Setter TargetName="Border" Property="BorderBrush" Value="Transparent" />
                                            <Setter TargetName="iAddBuddy" Property="Visibility" Value="Hidden" />
                                            <Setter TargetName="iAddBuddyDissabled" Property="Visibility" Value="Visible" />
                                        </Trigger>
                                    </ControlTemplate.Triggers>
                                </ControlTemplate>
                            </Setter.Value>
                        </Setter>
                    </Style>
                </Button.Style>
            </Button>

            <Border Name="bDeleteBuddyBorder" Grid.Column="2" BorderThickness="1"
                    SnapsToDevicePixels="True" Margin="0,2,0,0">
                <Image Name="iDeleteBuddy" Margin="1" IsEnabled="True"
                   Source="Images\Delete 32x32.png">
                    <Image.Style>
                        <Style TargetType="{x:Type Image}">
                            <Style.Triggers>
                                <Trigger Property="IsEnabled" Value="False">
                                    <Setter Property="Source" Value="Images\Delete Disabled 32x32.png" />
                                </Trigger>
                            </Style.Triggers>
                        </Style>
                    </Image.Style>
                </Image>
                <Border.Style>
                    <Style TargetType="Border">
                        <Setter Property="BorderBrush" Value="Transparent" />
                        <Setter Property="Background" Value="Transparent" />
                        <Style.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="BorderBrush" Value="#FFD528" />
                            </Trigger>
                        </Style.Triggers>
                    </Style>
                </Border.Style>
            </Border>

            <Border Name="bBlockUserBorder" Grid.Column="3" BorderThickness="1"
                    SnapsToDevicePixels="True" Margin="0,2,0,0">
                <Image Name="iBlockUser" Margin="1" IsEnabled="True"
                       Source="Images\Block Buddy 32x36.png">
                    <Image.Style>
                        <Style TargetType="{x:Type Image}">
                            <Style.Triggers>
                                <Trigger Property="IsEnabled" Value="False">
                                    <Setter Property="Source" Value="Images\Block Buddy Dissabled 32x36.png" />
                                </Trigger>
                            </Style.Triggers>
                        </Style>
                    </Image.Style>
                </Image>
                <Border.Style>
                    <Style TargetType="Border">
                        <Setter Property="BorderBrush" Value="Transparent" />
                        <Setter Property="Background" Value="Transparent" />
                        <Style.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="BorderBrush" Value="#FFD528" />
                            </Trigger>
                        </Style.Triggers>
                    </Style>
                </Border.Style>
            </Border>-->
        </Grid>

        <TextBox Name="txtChat" Grid.Row="2" Margin="4,2,4,2"
                 Style="{StaticResource sRenegadeTextBox}" UndoLimit="0" />

        <Grid Grid.Row="3">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="45" />
            </Grid.ColumnDefinitions>

            <TextBox Name="txtSend" Grid.Column="0" MaxLength="495" 
                     Height="22" Margin="4,1,2,4" VerticalContentAlignment="Center" 
                     Style="{StaticResource sRenegadeTextBox}" UndoLimit="0"
                     KeyUp="txtSend_KeyUp" />
            <Button Name="btnSend" Content="Send" Grid.Column="1" 
                    Style="{StaticResource sRenegadeButton}" 
                    Height="22" Width="40" Margin="0,1,4,4" Click="btnSend_Click" />
        </Grid>
    </Grid>
</Window>

По сути, даже если я создаю пустое окно WPF с фоновым изображением для основной сетки и двумя обработчиками событий Opening и Closed, оно все равно остается в памяти, но когда все «пустые окна wpf» закрываются, память только немного уменьшается. немножко. Почему от простых окон не избавляются полностью? Я даже пытался реализовать удаленную функциональность, закодированную выше.