A mono.security.dll file is a shared library, which is necessary for the operation of many applications. If a message is displayed, when starting the program, about an error related to the lack or damage of a mono.security.dll file, you should download its new version and put it in the installation directory of the appropriate program. To do this, look at all the links to the mono.security.dll file, which you can find below. Select the file with the appropriate category and download the one you need – in the original version or a compressed one. But before copying the file to the application directory, remember to uncompress this version of the mono.security.dll file by using a suitable program.
After downloading the mono.security.dll file, you have to put it in the appropriate folder, so that the application that needs it can use it. To do this, follow these steps:
You have one more opportunity. If after copying the mono.security.dll file to the directory of the program there is still an error with this file, try copying it to one of the following folders: