Q: How to resolve “.NET core DLL missing” errors in Envelope

A:  Make sure that the framework which was used to develop the software is installed in the same version on the computer that runs Envelope. Example:
- Developer used .NET 3.5 to develop the application
- Employee uses Windows 7 with .NET 4.0 preinstalled to envelope application
– The employee should also install the .NET Framework 3.5

If the error persists, Envelope offers the option to enter the path to the required files. From:
 File-> Settings go to “.NET Directories” and press “Add”. You will find the core assemblies here:
C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\<VERSION>\Profile\Client