Question

i have one Managed C++ object

bool Test::TestStringNumber(String^ testData)
{
   int len = testData->Length;
   if(len > 0) return true;
}

am using same function in C#

void Main()
{
    Test t = new Test()
    t.TestStringNumber(null);
}

but application crash. during debugging i observed in C++ it comes as ‘undefined value’

ALso i tried to test testData with nullptr in c++ code, and used following code, but still same crash

if( testData == nullptr && String::IsNullOrEmpty( testData )) 

*One way is to catch exception in C++ managed code and return ;

Answer 1

bool Test::TestStringNumber(String^ testData)
{
  return !String::IsNullOrEmpty( testData );
}

Should work just fine? Not that I see the point in your code?