It then calls the Load() function for the current application domain to load the FoggyWeb DLL into the application domain. After the FoggyWeb DLL is loaded into the current application domain, the loader invokes the following method from the DLL: Microsoft.IdentityServer.WebExtension.WebHost. It then calls the Load() function for the current application domain to load the FoggyWeb DLL into the application domain. After the FoggyWeb DLL is loaded into the current application domain, the loader invokes the following method from the DLL: Microsoft.IdentityServer.WebExtension.WebHost