c#代码使用ResourceDictionary样式

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
...
 <Style x:Key="AlertButton" TargetType="ButtonBase" BasedOn="{StaticResource SystemButtonBase}">
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="Margin" Value="8"/>
        <Setter Property="Padding" Value="4"/>
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Cursor" Value="Hand"></Setter>
                <Setter Property="Opacity" Value=".8" />
            </Trigger>
            <Trigger Property="IsPressed" Value="True">
                <Setter Property="Opacity" Value=".4" />
            </Trigger>
        </Style.Triggers>
    </Style>
...
</ResourceDictionary>

            ResourceDictionary mystyles;
            mystyles = new ResourceDictionary();
            mystyles.Source = new Uri("/FirstFloor.ModernUI;component/Assets/Button.xaml",
                    UriKind.RelativeOrAbsolute);
            System.Windows.Style btnStyle = mystyles["AlertButton"] as Style;

　　　　　　　　new Button
                {
                    Foreground = new SolidColorBrush(Colors.White),
                    Content = content,
                    Command = this.CloseCommand,
                    CommandParameter = result,
                    IsDefault = false,
                    IsCancel = isCancel,
                    MinHeight = 21,
                    MinWidth = 65,
                    Background = new SolidColorBrush(System.Windows.Media.Color.FromRgb(252, 73, 0)),
                    Margin = new Thickness(4, 0, 4, 0)
                        ,
                    Style = new Style(typeof(Button), btnStyle) { Triggers = { tRed } }
                };