Silverlight DataForm 内存泄漏
一些背景
我注意到设置 DataForm 的 EditTemplate（来自 Silverlight Toolkit）可能会导致 DataForm 不被垃圾收集。因此，DataForm 的父控件也无法进行垃圾收集，从而导致非常严重的内存泄漏。
下面是一些演示这种情况的 XAML。
<toolkit:DataForm HorizontalAlignment="Stretch" Margin="10" VerticalAlignment="Stretch">
<toolkit:DataForm.EditTemplate>
<DataTemplate>
<toolkit:DataField Label="Dummy Binding:">
<TextBox Text="{Binding DummyBinding, Mode=TwoWay}" />
</toolkit:DataField>
</DataTemplate>
</toolkit:DataForm.EditTemplate>
</toolkit:DataForm>
我已在 CodePlex 上提出问题。该问题有一个附件，其中包含 项目 演示了该案例。
所以，我的问题是
还有其他人遇到过这个问题吗？更重要的是，有人知道任何解决方法吗？我怎样才能强制这个DataForm被垃圾收集？
Some Background
I have noticed that setting the EditTemplate of a DataForm (from the Silverlight Toolkit) can cause the DataForm to not be garbage collected. Consequently, the parent control of the DataForm cannot be garbage collected either, causing a very significant memory leak.
Here's some XAML which demonstrates the case.
<toolkit:DataForm HorizontalAlignment="Stretch" Margin="10" VerticalAlignment="Stretch">
<toolkit:DataForm.EditTemplate>
<DataTemplate>
<toolkit:DataField Label="Dummy Binding:">
<TextBox Text="{Binding DummyBinding, Mode=TwoWay}" />
</toolkit:DataField>
</DataTemplate>
</toolkit:DataForm.EditTemplate>
</toolkit:DataForm>
I have opened an issue on CodePlex. The isssue has an attachment which has a project which desmonstrates the case.
So, My Question Is
Has anyone else encountered this issue? More importantly, does anyone know of any workarounds? How can I force this DataForm to be garbage collected?
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仅供参考，对于任何关心这个问题的人...微软发布了一个修复程序。
Silverlight 4 服务版本
FYI, to anyone concerned about this issue... MS released a fix for this.
Silverlight 4 Service Release
事实证明，这个问题并不是 DataForm 控件特有的，它实际上是 Silverlight 4 运行时的问题。所有使用 DataTemplate 的内置控件和用户控件都存在此问题，此线程。 Tim Heuer（Silverlight 项目经理）在该线程中做出了响应，并提出了一种可能的解决方法，结果好坏参半。他确实提到他们已经有一个修复程序进入测试，所以希望更新应该很快发布。
It turns out that this issue is not specific to the DataForm control, and that it is actually a problem with the Silverlight 4 runtime. All built-in controls and user controls that use a DataTemplate have this issue as discussed in greater detail in this thread. Tim Heuer (the Silverlight Program Manager) is responsive on the thread and proposes a possible workaround with mixed results. He does mention that they already have a fix entered into testing, so hopefully an update should be released relatively soon.