When packaging, it is important to ensure that the files are not tempered with, and from the source. You may check the genuinenity and md5 by using this link:
ex:
http://www.backgroundtask.eu/Systeemtaken/taakinfo/1206085/Microsoft.VisualBasic.PowerPacks.dll/
Another resource for MD5 or SHA256 verification of select dlls:
http://www.fixerrorkit.com/
https://www.reasoncoresecurity.com
https://www.reasoncoresecurity.com/gcursor.dll-5ab17aa167ccfb5a286a48836d497b79b12bd96d.aspx
Virus total gives suspecious insight on microsoft dll here:
https://www.virustotal.com/en/file/81edea696a5d42d8641eabd03c57d11c4236915b484157d52743046344430a50/analysis/1448692195/
You may check the MD5 is good:
http://systemexplorer.net/file-database/file/microsoft.visualbasic.powerpacks-dll