Did it possible to cast a generic type of derived class to generic type of base

Did it possible to cast a generic type of derived class to
generic type of base class?

Question Posted / partha

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Did it possible to cast a generic type of derived class to generic type of base class?..

Answer / karthikeyant

Yes, it is Possible, if both are same type , But it is not
possible if both are diffrent type, below a gave sample
code describe things.

Example:

class BaseClassGenrics<T>
{

}

class DerivedClassGenrics<T> : BaseClassGenrics<T>
{

}

//-- correct one
DerivedClassGenrics<int> derivedClassGenrics = new
DerivedClassGenrics<int>();

BaseClassGenrics<int> gaseClassGenrics = new
BaseClassGenrics<int>();

gaseClassGenrics = derivedClassGenrics;

//-- Wrong one
DerivedClassGenrics<int> derivedClassGenrics = new
DerivedClassGenrics<int>();
BaseClassGenrics<string> gaseClassGenrics = new
BaseClassGenrics<string>();

gaseClassGenrics = derivedClassGenrics;

You get error like this : Cannot implicitly convert
type 'DerivedClassGenrics<int>'
to 'BaseClassGenrics<string>'

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Did it possible to cast a generic type of derived class to generic type of base class?..

Answer / lalit pradhan

Good explaination Karthikeyant :)
Also in addition to that the following cast is also not
possible. It will compile but give you casting error on
compile time.

DerivedClassGenrics<int> derivedClassGenrics = new
DerivedClassGenrics<int>();

BaseClassGenrics<int> baseClassGenrics = new
BaseClassGenrics<int>();

derivedClassGenrics = (DerivedClassGenrics<int>)
baseClassGenrics;

Enjoy!!!
Lalit Pradhan a.k.a DOTNET Gadha

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