圆角button

方案1：

   <Window.Resources>
        <ControlTemplate  x:Key="CornerButton" TargetType="{x:Type Button}">
            <Border BorderBrush="Green" BorderThickness="1" CornerRadius="10" Background="Red">
                <ContentPresenter Content="{TemplateBinding ContentControl.Content}" HorizontalAlignment="Center" VerticalAlignment="Center" />
            </Border>
        </ControlTemplate>
        <ControlTemplate x:Key="yuanjiaoBtn" TargetType="{x:Type Button}">            
            <Border BorderBrush="Gray" BorderThickness="0.5" CornerRadius="12" Background="Black">
                <ContentPresenter Content="{TemplateBinding ContentControl.Content}"/>
            </Border>    
            
        </ControlTemplate>
        <ControlTemplate  x:Key="CornerTextBox" TargetType="{x:Type TextBox}">
            <Border BorderBrush="Blue" BorderThickness="1" CornerRadius="10" Background="#FFD5F0D4">
                <ScrollViewer x:Name="PART_ContentHost" VerticalAlignment="Center"/>
            </Border>
        </ControlTemplate>
    </Window.Resources>
    <Canvas Background="#1b1b1b">
        <Button x:Name="btnOK" Content="OK" Template="{StaticResource CornerButton}" Height="26" Canvas.Top="175" Width="61" Canvas.Left="58" Click="btnOK_Click"></Button>
        <Button x:Name="btnCancel" Content="Cancel" Template="{StaticResource yuanjiaoBtn}" Height="26" Canvas.Top="175" Width="61" Canvas.Left="138"></Button>
        <TextBox Template="{StaticResource CornerTextBox}" Canvas.Left="74" Canvas.Top="50" Height="23" Name="textBox1" Width="120" Background="#FF7FBC7D" />
        <TextBox Template="{StaticResource CornerTextBox}" Canvas.Left="74" Canvas.Top="108" Height="23" Name="textBox2" Width="120" />
</Canvas>

方案2：

<Button Content="地图" Height="50" Margin="555,282,466,393" Width="50">
    <Button.Template>
        <ControlTemplate TargetType="{x:Type Button}">
            <Border BorderBrush="{TemplateBinding Control.BorderBrush}" BorderThickness="0" CornerRadius="3,13,3,13" Name="PART_Background">
                <Border.Background>
                    <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                        <GradientStop Color="White" Offset="0.0" />
                        <GradientStop Color="Silver" Offset="0.5" />
                        <GradientStop Color="White" Offset="0.0" />
                    </LinearGradientBrush>
                </Border.Background>
                <ContentPresenter Content="{TemplateBinding ContentControl.Content}" HorizontalAlignment="Center" VerticalAlignment="Center" />
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="UIElement.IsMouseOver" Value="True">
                    <Setter Property="Border.Background" TargetName="PART_Background">
                        <Setter.Value>
                            <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                                <GradientStop Color="Silver" Offset="0.0" />
                                <GradientStop Color="White" Offset="0.5" />
                                <GradientStop Color="Silver" Offset="0.0" />
                            </LinearGradientBrush>
                        </Setter.Value>
                    </Setter>
                </Trigger>
                <Trigger Property="ButtonBase.IsPressed" Value="True">
                    <Setter Property="UIElement.Effect">
                        <Setter.Value>
                            <DropShadowEffect BlurRadius="10" Color="Black" Direction="0" Opacity="0.6" RenderingBias="Performance" ShadowDepth="0" />
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </Button.Template>
</Button>