Plugin with char as a return value -problem

I would like to use char pointer as a return value like it is done in Unity’s example plugin but I get some Chinese(?) markings (效汬o) instead of simple “Hello”.

Unity’s example project can be found here: http://docs.unity3d.com/Documentation/Images/manual/SimplestPluginExample-4.0.zip

To answer was to use Marshal.PtrToStringAnsi instead Marshal.PtrToStringAuto