Add project files.

Nodify/Themes/Styles/PendingConnection.xaml

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+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:local="clr-namespace:Nodify">
+
+    <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
+
+    <Style TargetType="{x:Type local:PendingConnection}">
+        <Setter Property="Background"
+                Value="#121212" />
+        <Setter Property="Foreground"
+                Value="White" />
+        <Setter Property="Stroke"
+                Value="DodgerBlue" />
+        <Setter Property="BorderBrush"
+                Value="Black" />
+        <Setter Property="EnablePreview"
+                Value="False" />
+        <Setter Property="StrokeThickness"
+                Value="3" />
+        <Setter Property="BorderThickness"
+                Value="1" />
+        <Setter Property="Visibility"
+                Value="Hidden" />
+        <Setter Property="StrokeDashArray"
+                Value="4 4" />
+        <Setter Property="Padding"
+                Value="5" />
+        <Setter Property="EnableSnapping"
+                Value="True" />
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="{x:Type local:PendingConnection}">
+                    <Canvas>
+                        <local:LineConnection Source="{TemplateBinding SourceAnchor}"
+                                              Target="{TemplateBinding TargetAnchor}"
+                                              Stroke="{TemplateBinding Stroke}"
+                                              StrokeThickness="{TemplateBinding StrokeThickness}"
+                                              StrokeDashArray="{TemplateBinding StrokeDashArray}"
+                                              Direction="{TemplateBinding Direction}"
+                                              Spacing="0"
+                                              ArrowSize="0 0"
+                                              SourceOffsetMode="None" 
+                                              TargetOffsetMode="None" />
+                        <Border Background="{TemplateBinding Background}"
+                                Canvas.Left="{Binding TargetAnchor.X, RelativeSource={RelativeSource TemplatedParent}}"
+                                Canvas.Top="{Binding TargetAnchor.Y, RelativeSource={RelativeSource TemplatedParent}}"
+                                Visibility="{TemplateBinding EnablePreview, Converter={StaticResource BooleanToVisibilityConverter}}"
+                                Padding="{TemplateBinding Padding}"
+                                BorderThickness="{TemplateBinding BorderThickness}"
+                                BorderBrush="{TemplateBinding BorderBrush}"
+                                CornerRadius="3"
+                                Margin="15">
+                            <ContentPresenter />
+                        </Border>
+                    </Canvas>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+</ResourceDictionary>