Update: Added bin *.dll and *.pdb to the string. I put any external resource DLL’s into a seperate folder outside the projects and purposefully add them to Subversion. Then all the dlls elsewhere are not included in subversion… which in theory would increase the size a lot.
In the settings for TortoiseSVN there is a section called Subversion which has some settings that need to be changed when installing on a windows system. Please see the "Official support for Windows ‘_svn’ directories" section on this page
The global Ignore Pattern I set to the following:
*.projdata obj tmp temp *proj.user *.o *.obj *.ncb *.suo *.pyc bin *.dll *.pdb
Also check the ‘Use "_svn" instead of ".svn" directories’ option.