Problem: How to read SVN-Properties of checkout folder

TeamCity gets sources of my SVN-repository located at trunk.
I have set there a SVN-property called "Version" with value = '1.2.3.4'.
How can i read this property in my BuildStep.

Hint:
I can read this with "svn getprops" in command-line window,
but i can not do this in TC-Buildstep, because userid and pwd is required
and i have no access to these values of the VCS-settings.