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Syntax) \u0648\u0623\u0633\u0644\u0648\u0628 \u0627\u0644\u0637\u0631\u064a\u0642\u0629 (Method Syntax) \u0628\u0641\u0639\u0627\u0644\u064a\u0629. \u0633\u062a\u0643\u062a\u0633\u0628 \u0645\u0647\u0627\u0631\u0627\u062a \u062a\u0635\u0641\u064a\u0629 \u0648\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0641\u064a \u0627\u0644\u0645\u0635\u0641\u0648\u0641\u0627\u062a \u0648\u0627\u0644\u0642\u0648\u0627\u0626\u0645\u060c \u0628\u0627\u0644\u0625\u0636\u0627\u0641\u0629 \u0625\u0644\u0649 \u062a\u062c\u0645\u064a\u0639 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 GroupBy \u0648\u0639\u0645\u0644\u064a\u0627\u062a \u0627\u0644\u062a\u062c\u0645\u064a\u0639 \u0627\u0644\u0645\u062e\u062a\u0644\u0641\u0629. \u0633\u0646\u0633\u062a\u0639\u0631\u0636 \u0643\u064a\u0641\u064a\u0629 \u062f\u0645\u062c \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0645\u0646 \u0645\u0635\u0627\u062f\u0631 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\u0633\u0646\u0633\u062a\u0639\u0631\u0636 \u0643\u064a\u0641\u064a\u0629 \u062f\u0645\u062c \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0645\u0646 \u0645\u0635\u0627\u062f\u0631 \u0645\u062a\u0639\u062f\u062f\u0629 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0639\u0645\u0644\u064a\u0627\u062a \u0627\u0644\u0627\u0646\u0636\u0645\u0627\u0645 (Join) \u0648\u0646\u062a\u0639\u0631\u0641 \u0639\u0644\u0649 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u062a\u0639\u0628\u064a\u0631\u0627\u062a \u0644\u0627\u0645\u0628\u062f\u0627 (Lambda Expressions) \u0644\u062a\u062d\u0633\u064a\u0646 \u0627\u0633\u062a\u0639\u0644\u0627\u0645\u0627\u062a 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