Prints the specified message in the user's Mathematica session.
This method is usable only in .NET code that is invoked in a call from Mathematica, as described in Part 1 of the .NET/Link User Guide. In other words, it is only used in code that is called from a Mathematica session via the "installable .NET" mechanism. Programmers who are launching the kernel and controlling it from a .NET program will have no use for this method.
The IKernelLink object on which this method will be called will probably be obtained via the StdLink.Link property.