决定控件外观的是ControlTemplate，它决定了控件“长成什么样子”，是控件的外衣。因此，可以通过设计ControlTemplate，制作
圆角文本框与圆角按钮。
<Window x:Class="ArtStudio.TemplateDemo"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="TemplateDemo" Height="300" Width="300">
<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="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>
<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 CornerButton}" 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>
</Window>
效果如图：
