Add-SPSolution : This solution contains one or more assemblies targeted for the global assembly cache
Exception Add-SPSolution : This solution contains one or more assemblies targeted for the global assembly cache. You should use a strong name for any assembly that will be in the global assembly cache. At line:1 char:1 + Add-SPSolution + ~~~~~~~~~~~~~~ + CategoryInfo : InvalidData: (Microsoft.Share...dletAddSolution: SPCmdletAddSolution) [Add-SPSolution], SPException + FullyQualifiedErrorId :Microsoft.SharePoint.PowerShell.SPCmdletAddSolutIon I have encountered this error when I deploy my SharePoint solution (wsp) to SharePoint farm as a global assembly. This error is due to not singing the project before deploy. Solution: Go to project properties of the SharePoint project. Then select an existing signing key or create a new one to sign and build the project. Now you can Build the project again and try using Add-SPSolution, which should work fine.