Sunday, April 15, 2012

Differences between value type and reference type?


Value Type Reference Type
Value type variable directly contain value itself. Reference type variable contain the address of object where the values are placed in memory. Or we can say they store the reference to object.
All value types are implicitly derived from System.ValueType. They are derived from System.Object class.
They doesn’t support inheritance. Means they are sealed implicitly. They can be inherited. They are internal by default.
A value type variable can’t be assigned value null. An object can have value null.
They can be declared without new operator. They can’t be declared without new operator.

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