Value Type Vs Reference Type - Object Class C#

Question

if Value Types and Reference Type are from Object Type which is a reference type, then how value type is value type and reference type is reference when they all come from refernce type.

Answer 1

Basically, it is a cheat ;-p

Any struct (i.e. anything inherited from ValueType) is treated with value-type semantics. But there is a boxing conversion to object as necessary; meaning that if you cast a struct to an object, it will create a special object (on the managed heap) containing the data (as a clone) from your value*.

The boxed version is a reference-type. You can unbox this (by casting) back to the struct version, which reverses this (copies the clones data from the object on the heap into your local value).

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*=unless it is an empty Nullable<T>, which boxes to null; likewise, null unboxes to an empty Nullable<T>.