private ContextItem GetValueNull(Type itemType)
{
if (itemType == null)
{
throw new ArgumentNullException("itemType");
}
if (!typeof(ContextItem).IsAssignableFrom(itemType))
{
throw new ArgumentException(string.Format((IFormatProvider)CultureInfo.CurrentCulture, Resources.Error_ArgIncorrectType, new object[2]
{
(object)"itemType",
(object)typeof(ContextItem).FullName
}));
}
ContextItem contextItem = (ContextItem)null;
EditingContext.DefaultContextItemManager.DefaultContextLayer defaultContextLayer = this._currentLayer;
while (defaultContextLayer != null && !defaultContextLayer.Items.TryGetValue(itemType, out contextItem))
{
defaultContextLayer = defaultContextLayer.ParentLayer;
}
return(contextItem);
}
internal DefaultContextLayer(EditingContext.DefaultContextItemManager.DefaultContextLayer parentLayer)
{
this._parentLayer = parentLayer;
}
internal DefaultContextItemManager(EditingContext context)
{
this._context = context;
this._currentLayer = new EditingContext.DefaultContextItemManager.DefaultContextLayer((EditingContext.DefaultContextItemManager.DefaultContextLayer)null);
}