public static void SetContext(DependencyObject obj, DZContext value)
{
obj.SetValue(ContextProperty, value);
}
public static DZContext EnsureContext(this MultiScaleImage msi)
{
DZContext context = GetContext(msi);
if (context == null)
{
context = new DZContext(msi);
SetContext(msi, context);
}
return context;
}