Source code

<UserControl
x:Name="this"
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" 
mc:Ignorable="d" designHeight="50" designWidth="300">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="20"/>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>

<!--Simpe databinding example-->
<!--1. set up connection for this item (ie. temperature sensor)-->
<!--2. bind values to your own usercontrol-->
<!--Binding example-->
<!--Content="{Binding ElementName=this, Path=DataContext.Value, FallbackValue=no data available}"-->

<!--default background-->
<Rectangle Grid.Row="0" Grid.RowSpan="1" Fill="#FF78949A" Opacity="0.35"/>
<Rectangle Grid.Row="1" Grid.RowSpan="1" Fill="#FFF0F0F0" Opacity="0.35"/>
<Rectangle Grid.Row="2" Grid.RowSpan="1" Fill="#FFF0F0F0" Opacity="0.35"/>

<!--Content: binding to source value: -->
<!--Content: ElementName=this -->
<!--Content: Path=DataContext.Value, for connetion to actual connected value -->
<Label
Content="{Binding ElementName=this, Path=DataContext.Value, FallbackValue=no data available}"
ContentStringFormat="Füllstand: {0:F0} %"
Grid.Row="2"
Opacity="1.0"
Height="Auto" 
Width="Auto"
Foreground="#FF000000"
FontSize="13"
FontFamily="Segoe UI"
FontWeight="Normal" 
Margin="0,0,0,0" 
Padding="0,0,0,0"
HorizontalAlignment="Center" 
VerticalAlignment="Center" />

<!--Content: binding to source value: -->
<!--Content: ElementName=this -->
<!--Content: Path=DataContext.DataName, for connetion to actual connected value name -->
<Label
Content="{Binding ElementName=this, Path=DataContext.DataName, FallbackValue=no data available}"
Grid.Row="0"

Opacity="1.0"
Height="Auto" 
Width="Auto"
Foreground="#FFEEEEEE"
FontSize="11"
FontFamily="Segoe UI"
FontWeight="Normal" 
Margin="3,0,0,0" 
Padding="0,0,0,0"
HorizontalAlignment="Left" 
VerticalAlignment="Center" />

<Image 
Grid.Row="1" 
Opacity="1.0"
Height="Auto" 
Width="Auto" 
Margin="5,5,5,5" 
Stretch="Uniform" 
StretchDirection="Both" >
<Image.Style>
<Style TargetType="{x:Type Image}">
<Setter Property="Source" Value="file:///C:\Program Files\aquasuite 2012\Content\images\aquatube_20.png" />

<Style.Triggers> 
<DataTrigger 
Value="True" 
Binding="{Binding ElementName=this, Path=DataContext.Value, ConverterParameter=50, Converter={StaticResource CompareSmalerConverter}}">
<Setter Property="Source" Value="file:///C:\Program Files\aquasuite 2012\Content\images\aquatube_20.png"/>
</DataTrigger>

<DataTrigger 
Value="True" 
Binding="{Binding ElementName=this, Path=DataContext.Value, ConverterParameter=50, Converter={StaticResource CompareGreaterEqualConverter}}">
<Setter Property="Source" Value="file:///C:\Program Files\aquasuite 2012\Content\images\aquatube_50.png"/>
</DataTrigger>

<DataTrigger 
Value="True" 
Binding="{Binding ElementName=this, Path=DataContext.Value, ConverterParameter=80, Converter={StaticResource CompareGreaterEqualConverter}}">
<Setter Property="Source" Value="file:///C:\Program Files\aquasuite 2012\Content\images\aquatube_100.png"/>
</DataTrigger>

</Style.Triggers>
</Style>
</Image.Style>
</Image>





</Grid>
</UserControl>

Source code

Application: aquasuite.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.ArgumentOutOfRangeException

Stack:
at System.Collections.Generic.List`1[[System.__Canon, mscorlib, 
Version=4.0.0.0, Culture=neutral, 
PublicKeyToken=b77a5c561934e089]].get_Item(Int32)
at Datahandling.DeviceItem.SetDeviceDataClass(DeviceType)
at Datahandling.DeviceItem.set_usb(UsbHid.UsbHidDevice)
at Datahandling.DeviceList.AttachDevice(UsbHid.UsbHidDevice)
.
.
.