我正在尝试在 Linux Mint 上安装 ca-certificates-mono：
sudo apt-get install ca-certificates-mono
不幸的是我遇到了这个错误。我尝试按照这里的说明操作（尝试了 ubuntu 的说明，因为它看起来最接近）：http://www.mono-project.com/download/#download-lin
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
ca-certificates-mono : Depends: libmono-corlib4.5-cil (>= 4.0.0~alpha1) but 3.2.8+dfsg-4ubuntu1.1 is to be installed
E: Unable to correct problems, you have held broken packages.