Using PrivateObject.Invoke to call a static conversion function do not compile in C#

Question

I have a test method where I call an private function that converts a kind of to another kind.

This static function have the following signature:

private static Destiny[] Array2Array<Origin,Destiny> (Origin[] OriginVector)

Since it's a private function, the tester give an error saying it cannot access it. So I got to this point:

Origin[] OriginVector = null; // TODO: Initialize to an appropriate value
Destiny[] expected = null; // TODO: Initialize to an appropriate value
Destiny[] actual;
var dummy = new ConversionClass();
var po = new PrivateObject( dummy, new PrivateType(typeof(ConversionClass)));
var acessor = new ConversionClassAcessor(po);

actual = po.Invoke("Array2Array", 
         new [] { typeof(Origin[]), typeof(Destiny[]) }, 
         new object[] { OriginVector } );

EDIT: That last line throws an compiler error with the message "cannot convert type object to Destiny[]". What I'm doing wrong?

Answer 1

The answer is simple.. cast it. :D

actual = (Destiny[]) po.Invoke("Array2Array", 
     new [] { typeof(Origin[]), typeof(Destiny[]) }, 
     new object[] { OriginVector } );

Answer 2

Mr Chris Shain,

I will here reproduce the solution you gave me. Since you deleted your answer, if you add a new one after this, I'll delete this and accept yours as the question's answer.

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The problem with the code above is that actual variable is of type Destiny[] and the result of Invoke is System.Object. An typecast is needed:

actual = (Destiny[]) po.Invoke("Array2Array", 
         new [] { typeof(Origin[]), typeof(Destiny[]) }, 
         new object[] { OriginVector } );