The Global Assembly Cache (GAC) is a Cache for globally available Assemblies. Most of the shared assemblies are installed inside GAC to shared across different applications. The Global Assembly Cache tool (Gacutil.exe) allow us to manipulate the contents of the global assembly cache along with install and un-install Assembly. During the development, we generally take help of gacutil from command prompt to install or uninstall assemblies into or from GAC. This is a repetitive process, every time you made some changes in your library you might need to deploy it into the GAC. Visual Studio has a nice feature called Pre-Build and Post-Build events. Using these events we execute some specific commands before or after the build. In this post I am going to show you how we can configure the post build event to deploy an Assembly to GAC.