Visual Studio never lists all items in the GAC. It only lists items that are noted in a particular registry key. Please see this knowledge base article for more info: How to display an assembly in the “Add Reference” dialog box You can always add a reference to the assembly by browsing to it on … Read more
gacutil comes with Visual Studio, not with VSTS. It is part of Windows SDK and can be download separately at http://www.microsoft.com/downloads/details.aspx?FamilyId=F26B1AA4-741A-433A-9BE5-FA919850BDBF&displaylang=en . This installation will have gacutil.exe included. But first check it here C:\Program Files\Microsoft SDKs\Windows\v6.0A\bin you might have it installed. As @devi mentioned If you decide to grab gacutil files from existing installation, note … Read more