neo@irx:~$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree... Done
Correcting dependencies... Done
The following extra packages will be installed:
  libmono-sharpzip0.84-cil
The following NEW packages will be installed:
  libmono-sharpzip0.84-cil
0 upgraded, 1 newly installed, 0 to remove and 98 not upgraded.
26 not fully installed or removed.
Need to get 0B/125kB of archives.
After unpacking 356kB of additional disk space will be used.
Do you want to continue [Y/n]? y
WARNING: The following packages cannot be authenticated!
  libmono-sharpzip0.84-cil
Install these packages without verification [y/N]? y
(Reading database ... 120542 files and directories currently installed.)
Unpacking libmono-sharpzip0.84-cil (from .../libmono-sharpzip0.84-cil_1.1.18-3~d hx1_all.deb) ...
dpkg: error processing /var/cache/apt/archives/libmono-sharpzip0.84-cil_1.1.18-3 ~dhx1_all.deb (--unpack):
 trying to overwrite `/usr/lib/mono/gac/ICSharpCode.SharpZipLib/0.84.0.0__1b03e6 acf1164f73/ICSharpCode.SharpZipLib.dll', which is also in package mono-classlib- 1.0
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/libmono-sharpzip0.84-cil_1.1.18-3~dhx1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

Errors were encountered while processing:
 libmono-sharpzip2.84-cil