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// ããã¯ã³ã³ãã¤ã«ã§ããªã(´ã»Ïã»ï½) // object -> T static public T As<T>( object o ) { return o as T; } // as T ã§ããããã«ã¯ T ã« class å¶ç´ãå¿ è¦ãããã¯ã³ã³ãã¤ã«ã§ããããæå¾ åä½ãããããããªãã // object(class=nullããä½ã) -> T st</t>â¦