C#

private void loadWorker_DoWork(object sender, DoWorkEventArgs e)
{
    var sensors = AppCore.AppDAL.GetSensors();
    e.Result = sensors;
}

public List<SensorEntity> GetSensors()
{
    lock (lockObj)
    {
        var query = getSensorQuery();
        var results = query.OrderBy(x => x.SensorName).ToList();

<pre>
    // THIS CALLS GetSensorCategoryBELOW
    results.ForEach(x => x.Category = GetSensorCategory(x.SensorTypeID));

    return results;
}

public SensorCategoryEntity GetSensorCategory(long ID)
{
    var query = getSensorCategoryQuery();
    var results = query.Where(x => x.ID == ID).FirstOrDefault();  //<== FAILS HERE
    return results;
}

private IQueryable<SensorCategoryEntity> getSensorCategoryQuery()
{
    var query = (from sc in dataContext.SensorTypes
                    select new SensorCategoryEntity
                    {
                        ID = sc.ID,
                        Name = sc.Name
                    });

    return query;
}

private void loadWorker_DoWork(object sender, DoWorkEventArgs e)
{
    Thread.Sleep(500);

    var sensors = Falcon6Core.Falcon6DAL.GetSensors();
    e.Result = sensors;
}

<pre>
private void listView1_ColumnReordered(object sender,   ColumnReorderedEventArgs e)
{          
   foreach(ColumnHeader cHeader in ListView1.Columns)
   {
       int iOldValue = e.OldDisplayIndex ;
       int iNewValue = e.NewDisplayIndex ;
       int index     = cHeader.DisplayIndex;
       
   }
}

private void root_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    var element = sender as FrameworkElement;
    anchorPoint = e.GetPosition(null);
    element.CaptureMouse();
    isDragging = true;
    e.Handled = true;
}

private void root_MouseMove(object sender, MouseEventArgs e)
{
    if (isDragging)
    {
        Canvas element = sender as Canvas;
        currentPoint = e.GetPosition(null);

        transform.X += currentPoint.X - anchorPoint.X;
        transform.Y = transform.Y;
        innerCanvas.RenderTransform = transform;
        anchorPoint = currentPoint;
    }
}

private void root_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
    if (isDragging)
    {
        var element = sender as FrameworkElement;
        element.ReleaseMouseCapture();
        isDragging = false;
        e.Handled = true;
    }
}        

if (currentPoint.X - anchorPoint.X > -1)
{
    transform.X += currentPoint.X - anchorPoint.X;
    transform.Y = transform.Y;
    innerCanvas.RenderTransform = transform;
    anchorPoint = currentPoint;
}