Casting between types

Type casting

in .NET programming , We can cast an object to any of its base class.
System.Object is derived by all of type, so they can cast into object.
Example:

class animal
{
//do something
}

class dog:animal
{
//do something
}

so, in the Main method, we could cast as:

animal an_animal=new dog()
//type casting to its base class

Box and boxing

Boxing is used to store value types in the garbage-collected heap (it means be temporary operation). Boxing is an implicit conversion of a value type to the type object (it means be on memory to heap) 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.

Unboxing

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 interfac

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