Suppress 3rd party library console output?

I need to call a 3rd party library that happens to spew a bunch of stuff to the console. The code simply like this...

int MyMethod(int a)
{
   int b = ThirdPartyLibrary.Transform(a);  // spews unwanted console output
   return b;
}

Is there an easy way to suppress the unwanted console output from ThirdPartyLibrary? For performance reasons, new processes or threads cannot be used in the solution.