Casting types when having the System.Type

[Guest]

Hello,

Is there a way to cast to another type when all we have is the System.Type.

Say, if we have:
Class MyBaseClass;
Class MyDerivedClass:MyBaseClass;

instead of:
MyDerivedClass derivedObject = new MyDerivedClass();
MyBaseClass baseObject = (MyBaseClass) derivedObject;

something like this:
public object CastToBaseClass( object someObject )
{
System.Type baseType = someObject.GetType().BaseType;

//now what? :S

object baseObject = (/* what goes here?*/) someObject;
//in my dreams: ... keyword "classof", inverse of "typeof"
// object baseObject = (classof( baseType ) ) someObject;
}

Anything like that in the framework?

Thanks

 

[Nicholas Paldino [.NET/C# MVP]]

Abelardo,

No there is not. How would you know what to call at compile time? You
will have to use reflection to do what you want.

Either that, or expose an interface that the type implements, and cast
the instance to that interface.

Hope this helps.

 

[The Crow]

but if there is two versions of one method created using "new" keyword and
you want to call base class's implementation?

 

[Nicholas Paldino [.NET/C# MVP]]

If you want to call the base class implementation, then get the type of
the base class and then reflect to get the MethodInfo of the shadowed
method.