During an automated build process I came across an error that MSBuild had thrown – ‘Error parsing the nested project section in solution file’. The problem stems from a change to a GUID for one of the Nested Projects within the Solution File. When comparing a Solution File for a successful build to the failed build I found the GUID had changed. To rectify the error I added a blank text file to the solution, saved the changes to the solution file, removed the text file and re-saved the solution file. This resolved the issues as the next build was successful.

The GAC holds assemblies installed on the local host that are available for shared use by other code. The Zap Cache is a sub-cache of the GAC that holds assemblies that have been precompiled into native machine code. Zap Cache assemblies are typically Fully Trusted libraries that are used frequently by the CLR itself, so precompilation boosts performance.

If you would like to know more, take a look at http://www.nsa.gov/ia/_files/app/oldFiles/NET_Framework_Sec1.pdf