所以我有，根据其项目被更改的控制，调用UpdateLayout请（）。这导致堆栈跟踪如下所示：

So I have a control which, in response to its items being changed, calls UpdateLayout(). This results in a stack trace that looks like the following:

说明：应用程序请求的过程终止通过   System.Environment.FailFast（字符串消息）。消息：不可恢复   系统错误。堆栈：在System.Environment.FailFast（System.String）   在MS.Internal.Invariant.FailFast（System.String，System.String）在   MS.Internal.Invariant.Assert（布尔，System.String）在   System.Windows.Window.GetWindowMinMax（）在   System.Windows.Window.MeasureOverride（System.Windows.Size）在   System.Windows.FrameworkElement.MeasureCore（System.Windows.Size）在   System.Windows.UIElement.Measure（System.Windows.Size）在   System.Windows.ContextLayoutManager.UpdateLayout（）在   System.Windows.UIElement.UpdateLayout（）在

Description: The application requested process termination through System.Environment.FailFast(string message). Message: Unrecoverable system error. Stack: at System.Environment.FailFast(System.String) at MS.Internal.Invariant.FailFast(System.String, System.String) at MS.Internal.Invariant.Assert(Boolean, System.String) at System.Windows.Window.GetWindowMinMax() at System.Windows.Window.MeasureOverride(System.Windows.Size) at System.Windows.FrameworkElement.MeasureCore(System.Windows.Size) at System.Windows.UIElement.Measure(System.Windows.Size) at System.Windows.ContextLayoutManager.UpdateLayout() at System.Windows.UIElement.UpdateLayout() at

显然，在某些情况下，GetWindowMinMax（）是失败的某种类型的断言（），这是造成一个调用Environment.FailFast。我可以在调用UpdateLayout请确保这些情况不会发生，以避免遇到此错误之前，请检查什么样的条件？

Clearly, under some circumstances, GetWindowMinMax() is failing an Assert() of some sort, which is causing an call to Environment.FailFast. What conditions can I check before calling UpdateLayout to ensure that these circumstances do not occur in order to avoid encountering this error?

推荐答案

取反射器和偷看$ C $下 GetWindowMinMax 。这是断言：

Take Reflector and peek at the code for GetWindowMinMax. This is the assert:

Invariant.Assert (!this.IsCompositionTargetInvalid, 
    "IsCompositionTargetInvalid is supposed to be false here") ;

所以，这样看来，你的窗口是不是真的创建为一个Win32窗口尚未或其Win32的窗口已经销毁。

So it would appear that your window is not really created as a Win32 window yet or its Win32 window is already destroyed.