What happens when I'm casting an Linq to Entity query to ObjectQuery? -

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सरल प्रश्न - यह वास्तव में क्या करता है? 

  var oq = (ऑब्जेक्टसिटी & lt; TENTity & gt ;) L2EQuery; वापसी ExecuteFirstorDefault & lt; TEntity & gt; (ओक, MergeOption.AppendOnly);

यह जूलिया लर्मन द्वारा पुस्तक प्रोग्रामिंग इकाई फ़्रेमवर्क से आंशिक रूप से है।

नारंगी ही प्रकार की जांच करने से अधिक कुछ नहीं करता है चूंकि आपकी क्वेरी ऑब्जेक्टिकटी प्रकार की है & lt; TENTity & gt ;, यह सफल होती है मुझे लगता है कि ExecuteFirstOrDefault को उस प्रकार के तर्क की आवश्यकता होती है, इसलिए कलाकार।


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