CA0053
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
Rule assembly could not be loaded.
This indicates that a rule assembly could not be loaded by reflection. This could occur if the user has custom rules that were not built correctly, or the analysis tool cannot load the assembly for other reasons, such as the file system access was denied.