WPF何如在后台通过代码创建控件，如何使用资源样式

关于App.XML查找资源字典“*****.xaml”出错

一、后台写控件

后台代码简单来创建一个Button，并引用资源样式

       public MainWindow()
        {
            InitializeComponent();
            CreateControl0();

        }
         private void CreateControl0()
         {
            Button btn = new Button();
            btn.Width = 60;
            btn.Height = 40;
            Style style= (Style)this.FindResource("BtnInfoStyle");
            btn.Style = style;
            btn.Click += Btn_Click;          
            grid1.Children.Add(btn);

         }

        private void Btn_Click(object sender, RoutedEventArgs e)
        {
            MessageBox.Show("111");
        }

二、传教资源样式
如何创建上述使用的BtnInfoStyle.xml
1.项目右键-添加-新建项-资源词典(WPF)

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:local="clr-namespace:WpfApp1">

    <!-- 应该在此定义资源字典条目。-->
    <Style x:Key="BtnInfoStyle" TargetType="Button">
        <Setter Property="Width" Value="70"/>
        <Setter Property="Height" Value="25"/>
        <Setter Property="Foreground" Value="White"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Background" Value="#43a9c7"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="Button">
                    <Border x:Name="border" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="True">
                        <TextBlock Text="{TemplateBinding Content}" Foreground="{TemplateBinding Foreground}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="border" Property="Background" Value="#2f96b4"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter TargetName="border" Property="Background" Value="#2a89a4"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

2.app.XML中使用资源

 <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <!--App.xaml资源样式-->
                <ResourceDictionary  Source="BtnInfoStyle.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>