public static readonly DependencyProperty XDataTransformProperty = DependencyProperty.Register(
    "XDataTransform", typeof(DataTransform), typeof(PlotBase), new PropertyMetadata(
    new IdentityDataTransform(), delegate(DependencyObject o, DependencyPropertyChangedEventArgs e)
        {
            Plot plot = o as Plot;
            if (plot != null)
            {
                plot.OnXDataTransformChanged(e);
            }
        }));

System.ArgumentException occurred
  Message=Default value for the 'XDataTransform' property cannot be bound to a specific thread.
  Source=WindowsBase
  StackTrace:
       at System.Windows.DependencyProperty.ValidateDefaultValueCommon(Object defaultValue, Type propertyType, 
String propertyName, ValidateValueCallback validateValueCallback, Boolean checkThreadAffinity)
       at System.Windows.DependencyProperty.RegisterCommon(String name, Type propertyType, Type ownerType, 
PropertyMetadata defaultMetadata, ValidateValueCallback validateValueCallback)
       at System.Windows.DependencyProperty.Register(String name, Type propertyType, Type ownerType, 
PropertyMetadata typeMetadata, ValidateValueCallback validateValueCallback)
       at System.Windows.DependencyProperty.Register(String name, Type propertyType, Type ownerType, 
PropertyMetadata typeMetadata)
       at Microsoft.Research.DynamicDataDisplay.PlotBase..cctor() in C:\thesis\application\SegmentSignal\ChartControlLibrary\PlotBase.cs:line 36
  InnerException: 

static void OnPropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
{
    Plot plot = o as Plot;
    if (plot != null)
    {
        plot.OnXDataTransformChanged(e);
    }
}

public static readonly DependencyProperty XDataTransformProperty = DependencyProperty.Register("XDataTransform", typeof(DataTransform), typeof(PlotBase), 
                                                                 new PropertyMetadata(new IdentityDataTransform(), new PropertyChangedCallback(OnPropertyChanged)));

Default value for the 'XDataTransform' property cannot be bound to a specific thread.