Wpf VisualStateManager未按宣传的那样工作

下面这个问题困扰了我好几天，但我只能把它提炼成最简单的形式。考虑下面的XAML：

<Window x:Class="VSMTest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">

    <Window.Resources>
        <Style TargetType="CheckBox">
            <Setter Property="Margin" Value="3"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="CheckBox">
                        <Grid x:Name="Root">
                            <Grid.Background>
                                <SolidColorBrush x:Name="brush" Color="White"/>
                            </Grid.Background>

                            <VisualStateManager.VisualStateGroups>
                                <VisualStateGroup Name="CheckStates">
                                    <VisualStateGroup.Transitions>
                                        <VisualTransition To="Checked" GeneratedDuration="00:00:03">
                                            <Storyboard Name="CheckingStoryboard">
                                                <ColorAnimationUsingKeyFrames Storyboard.TargetName="brush" Storyboard.TargetProperty="Color">
                                                    <DiscreteColorKeyFrame KeyTime="0" Value="LightGreen"/>
                                                </ColorAnimationUsingKeyFrames>
                                            </Storyboard>
                                        </VisualTransition>

                                        <VisualTransition To="Unchecked" GeneratedDuration="00:00:03">
                                            <Storyboard Name="UncheckingStoryboard">
                                                <ColorAnimationUsingKeyFrames Storyboard.TargetName="brush" Storyboard.TargetProperty="Color">
                                                    <DiscreteColorKeyFrame KeyTime="0" Value="LightSalmon"/>
                                                </ColorAnimationUsingKeyFrames>
                                            </Storyboard>
                                        </VisualTransition>
                                    </VisualStateGroup.Transitions>

                                    <VisualState Name="Checked">
                                        <Storyboard Name="CheckedStoryboard" Duration="0">
                                            <ColorAnimationUsingKeyFrames Storyboard.TargetName="brush" Storyboard.TargetProperty="Color">
                                                <DiscreteColorKeyFrame KeyTime="0" Value="Green"/>
                                            </ColorAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>

                                    <VisualState Name="Unchecked">
                                        <Storyboard Name="UncheckedStoryboard" Duration="0">
                                            <ColorAnimationUsingKeyFrames Storyboard.TargetName="brush" Storyboard.TargetProperty="Color">
                                                <DiscreteColorKeyFrame KeyTime="0" Value="Red"/>
                                            </ColorAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>
                            </VisualStateManager.VisualStateGroups>

                            <ContentPresenter/>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>

    <StackPanel>
        <CheckBox x:Name="cb1">Check Box 1</CheckBox>
        <CheckBox x:Name="cb2">Check Box 2</CheckBox>
        <CheckBox x:Name="cb3">Check Box 3</CheckBox>
    </StackPanel>
</Window>

如果启用动画跟踪，则在转换成功完成时将获得以下输出：

System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='6148812'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='8261103'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36205315'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='18626439'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36893403'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckingStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='49590434'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='<null>'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36893403'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckingStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='49590434'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='<null>'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='16977025'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='16977025'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='16977025'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 

System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='6148812'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='8261103'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36205315'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='18626439'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36893403'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckingStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='49590434'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='<null>'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 

System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='44177654'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；Storyboard name='UncheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：
System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='6148812'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；Storyboard name='UncheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='8261103'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：
System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='36205315'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；Storyboard name='UncheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='18626439'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：
System.Windows.Media.Animation开始：3：情节提要已删除；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='44177654'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；Storyboard name='UncheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation停止：3：
System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='36893403'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；故事板名称='CheckingStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：
System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='49590434'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；故事板名称=“”；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：
System.Windows.Media.Animation开始：3：情节提要已删除；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='36893403'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；故事板名称='CheckingStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation停止：3：
System.Windows.Media.Animation开始：3：情节提要已删除；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='49590434'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；故事板名称=“”；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation停止：3：
System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='16977025'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；故事板名称='CheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：
System.Windows.Media.Animation开始：3：情节提要已删除；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='16977025'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；故事板名称='CheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation停止：3：
System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='16977025'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；故事板名称='CheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：

当转换未能成功完成时，我得到以下输出：

System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='6148812'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='8261103'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36205315'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='18626439'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36893403'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckingStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='49590434'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='<null>'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36893403'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckingStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='49590434'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='<null>'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='16977025'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='16977025'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='16977025'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 

System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='6148812'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='8261103'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36205315'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='18626439'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 3 : Storyboard has been removed; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='44177654'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='UncheckedStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'
System.Windows.Media.Animation Stop: 3 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='36893403'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='CheckingStoryboard'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 
System.Windows.Media.Animation Start: 1 : Storyboard has begun; Storyboard='System.Windows.Media.Animation.Storyboard'; Storyboard.HashCode='49590434'; Storyboard.Type='System.Windows.Media.Animation.Storyboard'; StoryboardName='<null>'; TargetElement='System.Windows.Controls.Grid'; TargetElement.HashCode='41837403'; TargetElement.Type='System.Windows.Controls.Grid'; NameScope='<null>'
System.Windows.Media.Animation Stop: 1 : 

System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='44177654'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；Storyboard name='UncheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='41837403'；TargetElement.Type='System.Windows.Controls.Grid'；名称范围=“”
System.Windows.Media.Animation停止：1：
System.Windows.Media.Animation开始：1：情节提要已开始；Storyboard='System.Windows.Media.Animation.Storyboard'；故事板。HashCode='6148812'；Storyboard.Type='System.Windows.Media.Animation.Storyboard'；Storyboard name='UncheckedStoryboard'；TargetElement='System.Windows.Controls.Grid'；HashCode='8261103'；TargetElement.Type='System.Windows.Controls.Grid'；名称镜
// Hook up generated Storyboard's Completed event handler
dynamicTransition.Completed += delegate
{
    if (transition.Storyboard == null ||
        transition.ExplicitStoryboardCompleted)
    {
        if (ShouldRunStateStoryboard(control, element, state, group))
        {
            group.StartNewThenStopOld(element, state.Storyboard);
        }

        group.RaiseCurrentStateChanged(element, lastState, state,
                                        control);
    }

    transition.DynamicStoryboardCompleted = true;
};

group.StartNewThenStopOld(element, transition.Storyboard, dynamicTransition); 

var masterStoryboard = new Storyboard();

if (transition.Storyboard != null)
{
    masterStoryboard.Children.Add(transition.Storyboard);
}

masterStoryboard.Children.Add(dynamicTransition);
group.StartNewThenStopOld(element, masterStoryboard);