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What is Boxing and Unboxing

Posted By: [email protected] on 6/29/2010 10:40:12 PM | Comments:1 [Forward This]
Hey, Please tell me What is Boxing and Unboxing
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Responses to the Discussion: What is Boxing and Unboxing
Reply by: rakesh on: 6/29/2010 11:58:50 PM
Boxing is used to store value types in the garbage-collected heap. Boxing is an implicit conversion of a value type to the type object or to any interface type implemented by this value type. Boxing a value type allocates an object instance on the heap and copies the value into the new object. Example: int i = 123; object o = i; // Implicit boxing Unboxing is an explicit conversion from the type object to a value type or from an interface type to a value type that implements the interface. An unboxing operation consists of: Checking the object instance to make sure that it is a boxed value of the given value type. Copying the value from the instance into the value-type variable. Example: int i = 123; // a value type object o = i; // boxing int j = (int)o; // unboxing
 
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