public void RegisterDataTemplates(ResourceDictionary dictionary)
{
foreach (var item in dictionary.Cast<DictionaryEntry>().Where(item => item.Value is DataTemplate))
{
var dataTemplate = (DataTemplate)item.Value;
_dataTemplates.Add(dataTemplate);
if (dataTemplate.DataType != null && dataTemplate.DataType is Type)
_templateByType.Add((Type)dataTemplate.DataType, dataTemplate);
}
}