wpf-visual-process-framework/VisionFrame/Nodes/LineNode.xaml

<UserControl x:Class="VisionFrame.Nodes.LineNode"
             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:local="clr-namespace:VisionFrame.Nodes"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <UserControl.Resources>
        <BooleanToVisibilityConverter x:Key="b2v"/>
    </UserControl.Resources>
    <Grid>
        <Button Width="14" Height="14" 
                Margin="{Binding CancelLocation,RelativeSource={RelativeSource AncestorType=UserControl}}"
                Foreground="White"
                    Content="&#xe660;"
                    FontFamily="{DynamicResource Iconfont}"
                    Style="{DynamicResource DeleteElementButtonStyle}"
                    Visibility="{Binding RelativeSource={RelativeSource AncestorType=UserControl},
                                         Path=IsMouseOver,
                                         Converter={StaticResource b2v}}"
                    Command="{Binding DataContext.DeleteElementCommand,RelativeSource={RelativeSource AncestorType=ItemsControl,Mode=FindAncestor}}"
                    CommandParameter="{Binding}"/>

    </Grid>
</UserControl>