Assert::IsNotNull or Assert::IsNull do not work for my C++ unit test

Hello,


I used to use Nunit to test my C# applications. But when I use Nunit to
test some C++ application I got some problem.
Assert::IsNotNull or Assert::IsNull do not work for for me.

Below is the code snippet. I got "error C2665:
'NUnit::Framework::Assert::IsNotNull' : none of the 3 overloads could
convert all the argument types      ".What I did wrong?

Histogram1D<T>* histoptr = new Histogram1D<T> (64);
Assert::IsNotNull(histo, "Test object.");
Assert::IsNull(histo, "Test object.");


Thanks for any help.




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