Take #2 - small implementation for not implemented member functions.

This is take #2, the first one failed code review - sorry to waste your time.

In this version, I made it working exactly the same way as in MS 4.5 implementation.

Thank you!
add a space before the opening parenthesis (see [coding guidelines](http://www.mono-project.com/Coding_Guidelines), this applies to the rest of the PR as well).