清空WPF自带样式，以及透明按钮

　空样式按钮

< Style x:Key= "EmptyButtonStyle"  TargetType= "Button">
            < Setter Property= "Padding"  Value= "0" />
            < Setter Property= "FocusVisualStyle"  Value= "{x:Null}" />
            < Setter Property= "Template">
                < Setter.Value>
                    < ControlTemplate TargetType= "Button">
                        < ContentPresenter Content= "{TemplateBinding Content}" />
                    < /ControlTemplate>
                < /Setter.Value>
            < /Setter>
        < /Style>

    < Button Width= "50"  Height= "50"  HorizontalAlignment= "Left"  Margin= "4,0,0,0"  Style= "{StaticResource EmptyButtonStyle}"  >
              < Image Source= "Styles/Images/KaraokeElibrary/button_left_normalmode.png">< /

透明样式按钮

< Style x:Key= "TransparentButtonStyle"  TargetType= "Button">
            < Setter Property= "Padding"  Value= "0" />
            < Setter Property= "FocusVisualStyle"  Value= "{x:Null}" />
            < Setter Property= "Template">
                < Setter.Value>
                    < ControlTemplate TargetType= "Button">
                        < Grid Background= "Transparent" />
                    < /ControlTemplate>
                < /Setter.Value>
            < /Setter>