title: Material Design Style PackIcon
body: <p>I created with Material Design a UserControl Button, based on the method behind I would like to reuse the template with change of the icon. I tried to add the materialdesign:Packicon into the UserControl.Resources, but seems wrong. The Attribute Style is already in use. How can I achieve my icon change?</p>
  
  <pre><code>&lt;UserControl x:Class="MaterialDesignTest1.UserControl2"
               xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
               xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
               xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
               mc:Ignorable="d" d:DesignWidth="300" Height="132"&gt;
      &lt;UserControl.Resources&gt;
              &lt;ResourceDictionary&gt;
              &lt;ResourceDictionary.MergedDictionaries&gt;
                  &lt;ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Button.xaml" /&gt;
              &lt;/ResourceDictionary.MergedDictionaries&gt;
          &lt;/ResourceDictionary&gt;
  
      &lt;/UserControl.Resources&gt;
  &lt;Grid&gt;
  &lt;Grid Height="132" &gt;
                  &lt;Grid.ColumnDefinitions&gt;
                      &lt;ColumnDefinition Width="Auto" /&gt;
                      &lt;ColumnDefinition Width="Auto" /&gt;
                      &lt;ColumnDefinition Width="Auto" /&gt;
                      &lt;ColumnDefinition Width="Auto" /&gt;
                  &lt;/Grid.ColumnDefinitions&gt;
                  &lt;Grid.RowDefinitions&gt;
                      &lt;RowDefinition Height="Auto" /&gt;
                      &lt;RowDefinition Height="Auto" /&gt;
                      &lt;RowDefinition Height="Auto" /&gt;
  
                  &lt;/Grid.RowDefinitions&gt;
                &lt;!-- Header --&gt;
                  &lt;Button Grid.Row="0" Grid.Column="0" Background="WhiteSmoke" BorderBrush="LightGray" Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" 
                          HorizontalAlignment="Center" VerticalAlignment="Center" Margin="1,1,1,1" Width="50" Height="50"&gt;
                      &lt;materialDesign:PackIcon Height="30" Width="30" Kind="BluetoothConnect" /&gt;
                  &lt;/Button&gt;
  
  &lt;/Grid&gt;
  </code></pre>