驾驶式点击导致事件无法触发

Question

Silverlight中标准的，没有样式的按钮。它住在ChildWindow。

当光标仍在移动时，我点击按钮但事件不会触发。

我确信第一次点击发生在按钮内部，鼠标也在内部释放。该图说明了我第一次点击的位置以及我最终的位置。我不是在拖动，而是尽快释放鼠标按钮。

    <Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>


    <Grid x:Name="MainContent" Grid.Row="0">
         <!-- MainContent here -->
    </Grid>


    <Grid  Grid.Row="1">
    <ContentControl Style="{StaticResource ContainerStyle}">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="*"/>
                    </Grid.ColumnDefinitions>
                    <Button
                        Grid.Column="2"
                        VerticalAlignment="Stretch"
                        VerticalContentAlignment="Stretch"
                        HorizontalAlignment="Stretch"
                        HorizontalContentAlignment="Stretch" 
                           Command="{Binding CancelCommand}"
                        Click="CancelButton_Click" />
                    <Button   
                        Grid.Column="1"
                        VerticalAlignment="Stretch"
                        VerticalContentAlignment="Stretch"
                        HorizontalAlignment="Stretch"
                        Width="{StaticResource CenterButtonWidth}"                           
                        Command="{Binding SaveCommand}"
                        CommandParameter="false" />
                    <Button          
                        Grid.Column="0"
                        VerticalAlignment="Stretch"
                        VerticalContentAlignment="Stretch"
                        HorizontalAlignment="Stretch"
                        HorizontalContentAlignment="Stretch"
                        Style="{StaticResource ButtonTwoToneStyle2}" 
                        Command="{Binding SaveCommand}"
                        CommandParameter="true" />
                </Grid>
            </ContentControl>
    </Grid> 
</Grid>