private static void UnsetDropDescriptionFlag(System.Windows.IDataObject dataObject, DataObjectExtensions.DropDescriptionFlags flag)
{
if (!DataObjectExtensions.dropDescriptions.ContainsKey(dataObject))
return;
DataObjectExtensions.DropDescriptionFlags descriptionFlags = DataObjectExtensions.dropDescriptions[dataObject];
DataObjectExtensions.dropDescriptions[dataObject] = (descriptionFlags | flag) ^ flag;
}
private static void SetDropDescriptionFlag(System.Windows.IDataObject dataObject, DataObjectExtensions.DropDescriptionFlags flag)
{
if (DataObjectExtensions.dropDescriptions.ContainsKey(dataObject))
{
IDictionary<System.Windows.IDataObject, DataObjectExtensions.DropDescriptionFlags> dictionary;
System.Windows.IDataObject index;
(dictionary = DataObjectExtensions.dropDescriptions)[index = dataObject] = dictionary[index] | flag;
}
else
DataObjectExtensions.dropDescriptions.Add(dataObject, flag);
}